Restore

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/12/1085180f28ea001d113789928b1573c2

@@ -0,0 +1,46 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				MyPanel myPanel = new MyPanel();
+				myPanel.clearAllPoints();
+				repaint();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/17/503a14e826ea001d113789928b1573c2

@@ -0,0 +1,31 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/18/307ae8092aea001d113789928b1573c2

@@ -0,0 +1,52 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear(); //clear array elements
+		repaint();
+	}
+	
+	public void undoPoint() {
+		if(points.size() - 1 > 0)
+			points.remove(points.size()-1); //remove last point
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/19/b03c287028ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				MyPanel myPanel = new MyPanel();
+				myPanel.clearAllPoints();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/1a/b0bb381328ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/1e/70294d3d25ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/1f/2094fa6728ea001d113789928b1573c2

@@ -0,0 +1,46 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/23/109a5c402aea001d113789928b1573c2

@@ -0,0 +1,31 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/23/90f49a5d21ea001d113789928b1573c2

@@ -0,0 +1,19 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					System.out.println("x: " + e.getX() + " y: " + e.getY());
+				}
+			}
+		});
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/27/30245b3924ea001d113789928b1573c2

@@ -0,0 +1,39 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(Point p: points) {
+			g.drawRect(p.x, p.y, 1, 1);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/29/d07d640820ea001d113789928b1573c2

@@ -0,0 +1,7 @@
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	public MyPanel() {
+		
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/2c/00ac2a0725ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/2e/b052b8a024ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 1; i < points.size(); ++i) {
+			g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/3/b0358b7e27ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void ClearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/31/008cbeb81dea001d113789928b1573c2

@@ -0,0 +1,4 @@
+
+public class MyFrame {
+
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/34/c01e93c124ea001d113789928b1573c2

@@ -0,0 +1,39 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/35/407c776e24ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+		for(int i = 1; i < points.size(); ++i) {
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/45/a0198e452aea001d113789928b1573c2

@@ -0,0 +1,31 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/4a/90a43b0b1eea001d113789928b1573c2

@@ -0,0 +1,28 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/5/90a65a2529ea001d113789928b1573c2

@@ -0,0 +1,44 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				MyPanel.clearAllPoints();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/57/00aa33f81dea001d113789928b1573c2

@@ -0,0 +1,4 @@
+
+public class MyPanel {
+
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/5a/f07fd05f26ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/60/1082a2b829ea001d113789928b1573c2

@@ -0,0 +1,51 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		repaint();
+	}
+	
+	public void undoPoint() {
+		points.remove(points.size()-1);
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/63/b0618ffb29ea001d113789928b1573c2

@@ -0,0 +1,51 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear(); //clear array elements
+		repaint();
+	}
+	
+	public void undoPoint() {
+		points.remove(points.size()-1); //remove last point
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/68/40dbe0632aea001d113789928b1573c2

@@ -0,0 +1,39 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(Point p: points) {
+			g.drawRect(p.x, p.y, 1, 1);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/6e/a0319cc529ea001d113789928b1573c2

@@ -0,0 +1,46 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/6e/d0d327d624ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/6f/007aef2127ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/6f/6012d85c24ea001d113789928b1573c2

@@ -0,0 +1,39 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 1; i < points.size(); ++i) {
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/70/a0eabf2623ea001d113789928b1573c2

@@ -0,0 +1,36 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private int x = -1;
+	private int y = 1;
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					x = e.getX();
+					y = e.getY();
+					System.out.println("x: " + x + " y: " + y);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		g.drawRect(x, y, 1, 1);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/79/b0fb623e24ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+		for(int i = 1; i < points.size(); ++i) {
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/7d/006c5ccd21ea001d113789928b1573c2

@@ -0,0 +1,26 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private int x = -1;
+	private int y = 1;
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					x = e.getX();
+					y = e.getY();
+					System.out.println("x: " + x + " y: " + y);
+				}
+			}
+		});
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/83/0011efe724ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawRect((int)points.get(0).x, (int)points.get(0).y, 1, 1);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/83/a08b2e3d2aea001d113789928b1573c2

@@ -0,0 +1,31 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/8f/c06506392aea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		MyPanel myPanel = new MyPanel();
+		this.add(myPanel, BorderLayout.CENTER);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				myPanel.clearAllPoints();
+			}
+		});
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/95/509eaae227ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/9d/40b5fa081eea001d113789928b1573c2

@@ -0,0 +1,28 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel)
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/9e/7075b5da28ea001d113789928b1573c2

@@ -0,0 +1,46 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/9e/709e448129ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		MyPanel myPanel = new MyPanel();
+		this.add(myPanel, BorderLayout.CENTER);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				myPanel.clearAllPoints();
+			}
+		});
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/a0/20ddc8492aea001d113789928b1573c2

@@ -0,0 +1,31 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/a1/e058d65827ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/a3/e0016b831eea001d113789928b1573c2

@@ -0,0 +1,28 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel());
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/a9/00e6c1a320ea001d113789928b1573c2

@@ -0,0 +1,17 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	public MyPanel() {
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					System.out.println("x: " + e.getX() + " y: " + e.getY());
+				}
+			}
+		});
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/ac/2037735227ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	public void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/b4/801c676620ea001d113789928b1573c2

@@ -0,0 +1,28 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/b5/908a49ab20ea001d113789928b1573c2

@@ -0,0 +1,18 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					System.out.println("x: " + e.getX() + " y: " + e.getY());
+				}
+			}
+		});
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/b7/b000566429ea001d113789928b1573c2

@@ -0,0 +1,46 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/c0/2012794120ea001d113789928b1573c2

@@ -0,0 +1,9 @@
+
+public class Start {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+
+	}
+
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/da/e04f58071eea001d113789928b1573c2

@@ -0,0 +1,26 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/de/a08d4c312aea001d113789928b1573c2

@@ -0,0 +1,52 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("Undo");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		MyPanel myPanel = new MyPanel();
+		this.add(myPanel, BorderLayout.CENTER);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				myPanel.clearAllPoints();
+			}
+		});
+		
+		b2.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				myPanel.undoPoint();
+			}
+		});
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/df/b01cd5d828ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				MyPanel myPanel = new MyPanel();
+				myPanel.clearAllPoints();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/e2/20d994e921ea001d113789928b1573c2

@@ -0,0 +1,35 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private int x = -1;
+	private int y = 1;
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					x = e.getX();
+					y = e.getY();
+					System.out.println("x: " + x + " y: " + y);
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		g.drawRect(x, y, 1, 1);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/e7/105a591822ea001d113789928b1573c2

@@ -0,0 +1,36 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private int x = -1;
+	private int y = 1;
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					x = e.getX();
+					y = e.getY();
+					System.out.println("x: " + x + " y: " + y);
+					repaint();
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		g.drawRect(x, y, 1, 1);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/ec/80b2432927ea001d113789928b1573c2

@@ -0,0 +1,45 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				clearAllPoints();
+				repaint();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/ed/50b2f4f524ea001d113789928b1573c2

@@ -0,0 +1,40 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawRect((int)points.get(0).x, (int)points.get(0).y, 0.5, 0.5);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/f1/304e1bec27ea001d113789928b1573c2

@@ -0,0 +1,44 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("Reset");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//button setting
+		b1.addActionListener(new ActionListener() { // Anonymous class.
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				repaint();
+			}
+		});
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		//setVisible
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/f3/204929ba29ea001d113789928b1573c2

@@ -0,0 +1,51 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private static ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	//methods
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear(); //clear array
+		repaint();
+	}
+	
+	public void undoPoint() {
+		points.remove(points.size()-1); //remove last point
+		repaint();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/f6/607bbc7d24ea001d113789928b1573c2

@@ -0,0 +1,39 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 1; i < points.size(); ++i) {
+			g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/ff/90235fdd26ea001d113789928b1573c2

@@ -0,0 +1,44 @@
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JPanel;
+
+public class MyPanel extends JPanel {
+	//instance variables
+	private ArrayList<Point> points = new ArrayList<Point>();
+	
+	//constructor
+	public MyPanel() {
+		//mouse listener
+		this.addMouseListener(new MouseAdapter() { // Anonymous class.
+			@Override
+			public void mouseClicked(MouseEvent e) {
+				//if left button clicked
+				if(e.getButton() == MouseEvent.BUTTON1) {
+					Point p = e.getPoint();
+					System.out.println("x: " + p.x + " y: " + p.y);
+					points.add(p);
+					repaint(); //force invoke paintComponent()
+				}
+			}
+		});
+	}
+	
+	@Override
+	protected void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		g.setColor(Color.RED);
+		for(int i = 0; i < points.size(); ++i) {
+			if(i == 0) g.drawLine((int)points.get(0).x, (int)points.get(0).y, (int)points.get(0).x, (int)points.get(0).y);
+			else g.drawLine((int)points.get(i).x, (int)points.get(i).y, (int)points.get(i-1).x, (int)points.get(i-1).y);
+		}
+	}
+	
+	public void clearAllPoints() {
+		points.clear();
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.history/ff/90c00ab420ea001d113789928b1573c2

@@ -0,0 +1,30 @@
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+
+public class MyFrame extends JFrame {
+	public MyFrame() {
+		//Auxiliary
+		this.setTitle("My Frame Title");
+		this.setSize(400, 300);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new BorderLayout());
+		
+		//JPanel
+		JPanel p = new JPanel();
+		p.setLayout(new FlowLayout());
+		this.add(p, BorderLayout.PAGE_START);
+		JButton b1 = new JButton("left");
+		JButton b2 = new JButton("right");
+		p.add(b1);
+		p.add(b2);
+		
+		//MyPanel
+		this.add(new MyPanel(), BorderLayout.CENTER);
+		
+		this.setVisible(true);
+	}
+}

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/history.version

@@ -0,0 +1 @@
+

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.version

@@ -0,0 +1 @@
+

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,3 @@
+eclipse.preferences.version=1
+encoding=UTF-8
+version=1

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.debug.ui.prefs

@@ -0,0 +1,3 @@
+eclipse.preferences.version=1
+org.eclipse.debug.ui.PREF_LAUNCH_PERSPECTIVES=<?xml version\="1.0" encoding\="UTF-8" standalone\="no"?>\r\n<launchPerspectives/>\r\n
+preferredTargets=default,org.eclipse.lsp4e.debug.toggleBreakpointTarget\:default|org.eclipse.lsp4e.debug.toggleBreakpointTarget\:org.eclipse.lsp4e.debug.toggleBreakpointTarget|

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.codeComplete.visibilityCheck=enabled
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.junit.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.junit.content_assist_favorite_static_members_migrated=true

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.launching.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.launching.PREF_VM_XML=<?xml version\="1.0" encoding\="UTF-8" standalone\="no"?>\r\n<vmSettings defaultVM\="57,org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType13,1683164332626">\r\n    <vmType id\="org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType">\r\n        <vm id\="1683164332626" name\="jre" path\="C\:\\Eclipse\\plugins\\org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_17.0.3.v20220515-1416\\jre"/>\r\n    </vmType>\r\n</vmSettings>\r\n

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs

@@ -0,0 +1,10 @@
+content_assist_lru_history=<?xml version\="1.0" encoding\="UTF-8" standalone\="no"?><history maxLHS\="100" maxRHS\="10"/>
+content_assist_number_of_computers=17
+content_assist_proposals_background=255,255,255
+content_assist_proposals_foreground=0,0,0
+eclipse.preferences.version=1
+org.eclipse.jdt.ui.formatterprofiles.version=22
+spelling_locale_initialized=true
+typefilter_migrated_2=true
+useAnnotationsPrefPage=true
+useQuickDiffPrefPage=true

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jsch.core.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jsch.core.hasChangedDefaultWin32SshHome=true

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jst.j2ee.webservice.ui.prefs

@@ -0,0 +1,2 @@
+areThereWebServices=false
+eclipse.preferences.version=1

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.m2e.discovery.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.m2e.discovery.pref.projects=

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.pde.api.tools.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+knownEEFragments=

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.ide.prefs

@@ -0,0 +1,5 @@
+SWITCH_PERSPECTIVE_ON_PROJECT_CREATION=always
+eclipse.preferences.version=1
+platformState=1659508920205
+quickStart=false
+tipsAndTricks=true

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.navigator.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.ui.navigator.ProjectExplorer.filterActivation=\:org.eclipse.jdt.java.ui.filters.HidePackageDeclaration\:org.eclipse.jdt.java.ui.filters.HideOutputFolder\:org.eclipse.buildship.ui.navigator.filter.gradle.subProject\:org.eclipse.ui.navigator.resources.nested.HideTopLevelProjectIfNested\:org.eclipse.buildship.ui.navigator.filter.gradle.buildfolder\:org.eclipse.jdt.java.ui.filters.HideEmptyInnerPackages\:org.eclipse.jst.j2ee.navigator.ui.filters.jetemitters\:org.eclipse.jdt.java.ui.filters.HideInnerClassFiles\:org.eclipse.ui.navigator.resources.filters.startsWithDot\:org.eclipse.jdt.java.ui.filters.HideEmptyLibraryContainers\:org.eclipse.jdt.java.ui.filters.HideImportDeclaration\:org.eclipse.jdt.java.ui.filters.HideSyntheticMembers\:org.eclipse.ui.navigator.resources.nested.HideFolderWhenProjectIsShownAsNested\:

Labs/Lab11/Lab11_2230026071/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+showIntro=false