Restore

Labs/Lab4/Lab4_2230026071/Question4/.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/Lab4/Lab4_2230026071/Question4/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question4</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/Lab4/Lab4_2230026071/Question4/.settings/org.eclipse.core.resources.prefs

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

Labs/Lab4/Lab4_2230026071/Question4/src/Chicken.java

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+
+public class Chicken {
+	//instance variables
+	private double weight;
+	private boolean sleeping;
+	
+	//constructor
+	public Chicken(double weight) {
+		this.sleeping = true;
+		this.weight = weight;
+	}
+	
+	//methods
+	public double getWeight() {return this.weight;}
+	
+	public boolean isSleeping() {return this.sleeping;}
+	
+	public void fallAsleep() {this.sleeping = true;}
+	
+	public void wakeUp() {this.sleeping = false;}
+	
+	//test
+	public static void testChicken() {
+		Chicken c = new Chicken(2.3);
+		System.out.println(c.getWeight() == 2.3);
+		System.out.println(c.isSleeping() == true);
+		c.wakeUp();
+		System.out.println(c.isSleeping() == false);
+		c.wakeUp(); // should do nothing because the chicken is already awake
+		System.out.println(c.isSleeping() == false);
+		c.fallAsleep();
+		System.out.println(c.isSleeping() == true);
+		c.fallAsleep(); // should do nothing because the chicken is already sleeping
+		System.out.println(c.isSleeping() == true);
+	}
+}

Labs/Lab4/Lab4_2230026071/Question4/src/Start.java

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+
+public class Start {
+	//the check() method should be static, because the main function is static, therefore it cannot accesses check() as check() is non-static.
+	//but anyway, check() could be a non-static method when re-creating a non-static Start class to access it.
+	public static String check(Chicken chicken) {
+		if(chicken.isSleeping() == true) return "sweet dreams";
+		else return "need coffee";
+	}
+
+	public static void main(String[] args) {
+		Chicken.testChicken();
+		Chicken c = new Chicken(2.3);
+		System.out.println(check(c));
+	}
+
+}