完了済

Question15-Polymorphism/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="output" path="build/classes"/>
+</classpath>

Question15-Polymorphism/.gitignore

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+/build/

Question15-Polymorphism/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question15-Polymorphism</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.common.project.facet.core.builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Question15-Polymorphism/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=21

Question15-Polymorphism/.settings/org.eclipse.wst.common.project.facet.core.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question15-Polymorphism/src/main/java/Car.java

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+
+public class Car {
+	
+	String name;
+	int velocity;
+	
+	public Car() {
+		
+	}
+	
+	public Car(String name,int velocity) {
+		this.name = name;
+		this.velocity = velocity;
+	}
+	
+	public void run() {
+		System.out.println(this.name+"は時速"+this.velocity+"で走った");
+	}
+	
+}

Question15-Polymorphism/src/main/java/Question15_1.java

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+
+public class Question15_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		Car sp = new SportCar();
+		sp.run();
+		Car tr = new Truck();
+		tr.run();
+		
+	}
+
+}

Question15-Polymorphism/src/main/java/Question15_2.java

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+
+public class Question15_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		Car sp = new SportCar();
+		Car tr = new Truck();
+		
+		Car[] cars = new Car[2];
+		cars[0] = sp;
+		cars[1] = tr;
+		
+		for (Car c:cars) {
+			c.run();
+		}
+		
+	}
+
+}

Question15-Polymorphism/src/main/java/Question15_3.java

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+
+public class Question15_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		Car car = new SportCar();
+		((SportCar)car).run();
+		
+	}
+
+}

Question15-Polymorphism/src/main/java/SportCar.java

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+
+public class SportCar extends Car {
+	
+	public SportCar() {
+		super("スポーツカー",100);
+	}
+	
+	@Override
+	public void run() {
+		System.out.println(this.name+"は時速"+(3*this.velocity)+"で走った");
+	}
+	
+}

Question15-Polymorphism/src/main/java/Truck.java

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+
+public class Truck extends Car {
+	
+	public Truck() {
+		super("トラック",30);
+	}
+	
+}