Restore

Labs/Lab7/Lab7_2230026071/Question9/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Labs/Lab7/Lab7_2230026071/Question9/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question9</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Labs/Lab7/Lab7_2230026071/Question9/.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

Labs/Lab7/Lab7_2230026071/Question9/src/Airplane.java

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+
+public class Airplane implements Flyer{
+	private String name;
+	//constructor
+	public Airplane(String name) {
+		this.name = name;
+	}
+	
+	//methods override
+	@Override
+	public String getName() {return this.name;}
+	
+	@Override
+	public boolean canFly() {return true;}
+	
+	//test
+	public static void testAirplane() {
+		Airplane a = new Airplane("Aircar");
+		System.out.println(a.getName() == "Aircar");
+		System.out.println(a.canFly() == true);
+		System.out.println(a.isDangerous() == false);
+	}
+
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Animal.java

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+
+public abstract class Animal {
+	//instance variable
+	private String name;
+	
+	//constructor
+	public Animal(String name) {
+		this.name = name;
+	}
+	
+	//methods
+	public String getName() {return this.name;}
+	
+	//abstract methods
+	public abstract int getLegs();
+	
+	public abstract boolean canFly();
+	
+	//test
+	public static void testAnimal() {}
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Bird.java

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+
+public abstract class Bird extends Animal implements Flyer{
+	//instance variable
+	private int numOfEggs;
+	
+	//constructor
+	public Bird(String name, int numOfEggs) {
+		super(name);
+		this.numOfEggs = numOfEggs;
+	}
+	
+	//methods
+	public int getNumOfEggs() {return this.numOfEggs;}
+	
+	//methods override
+	@Override
+	public int getLegs() {return 2;}
+	
+	@Override
+	public abstract boolean canFly();
+	
+	//test
+	public static void testBird() {}
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Dog.java

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+
+public class Dog extends Animal{
+	//constructor
+	public Dog(String name) {
+		super(name);
+	}
+	
+	//methods override
+	@Override
+	public int getLegs() {return 4;}
+	
+	@Override
+	public boolean canFly() {return false;}
+	
+	//test
+	public static void testDog() {
+		Dog d = new Dog("Nice Doggy");
+		// The getName method is inherited from Animal.
+		// The getLegs and canFly methods come from Dog itself.
+		System.out.println(d.getName() == "Nice Doggy");
+		System.out.println(d.getLegs() == 4);
+		System.out.println(d.canFly() == false);
+	}
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Flyer.java

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+
+public interface Flyer {
+	public String getName();
+	public boolean canFly();
+	//make its default value = false, therefore, only class ostrich needs override it
+	public default boolean isDangerous() {return false;}
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Magpie.java

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+
+public class Magpie extends Bird{
+	//constructor
+	public Magpie(String name) {
+		super(name, 6);
+	}
+	
+	//method
+	@Override
+	public boolean canFly() {return true;}
+	
+	//test
+	public static void testMagpie() {
+		Magpie m = new Magpie("Maggie");
+		System.out.println(m.getName() == "Maggie");
+		System.out.println(m.getLegs() == 2);
+		System.out.println(m.getNumOfEggs() == 6);
+		System.out.println(m.canFly() == true);
+		System.out.println(m.isDangerous() == false);
+	}
+
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Ostrich.java

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+
+public class Ostrich extends Bird{
+	//constructor
+	public Ostrich(String name) {
+		super(name, 10);
+	}
+	
+	//methods override
+	@Override
+	public boolean canFly() {return false;}
+	
+	@Override
+	public boolean isDangerous() {return true;}
+	
+	//test
+	public static void testOstrich() {
+		Ostrich o = new Ostrich("Ossie");
+		System.out.println(o.getName() == "Ossie");
+		System.out.println(o.getLegs() == 2);
+		System.out.println(o.getNumOfEggs() == 10);
+		System.out.println(o.canFly() == false);
+		System.out.println(o.isDangerous() == true);
+	}
+
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Pegasus.java

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+
+public class Pegasus extends Bird{
+	//constructor
+	public Pegasus(String name) {
+		super(name, 0);
+	}
+	
+	//methods override
+	@Override
+	public int getLegs() {return 4;}
+	
+	@Override
+	public boolean canFly() {return true;}
+	
+	@Override
+	public int getNumOfEggs() {
+		System.out.println("Pegasi do not lay eggs!"); //message
+		return 0;
+	}
+	
+	//test
+	public static void testPegasus() {
+		Pegasus p = new Pegasus("Peggie");
+		System.out.println(p.getName() == "Peggie");
+		System.out.println(p.getLegs() == 4);
+		System.out.println(p.getNumOfEggs() == 0); // Message printed here.
+		System.out.println(p.canFly() == true);
+		System.out.println(p.isDangerous() == false);
+	}
+
+}

Labs/Lab7/Lab7_2230026071/Question9/src/Start.java

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+
+public class Start {
+
+	public static void main(String[] args) {
+		Animal.testAnimal();
+		Dog.testDog();
+		Bird.testBird();
+		Magpie.testMagpie();
+		Ostrich.testOstrich();
+		Pegasus.testPegasus();
+		Airplane.testAirplane();
+	}
+
+}