練習問題

Question10-InstanceAndClass/.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>

Question10-InstanceAndClass/.gitignore

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+/build/

Question10-InstanceAndClass/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question10-InstanceAndClass</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>

Question10-InstanceAndClass/.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

Question10-InstanceAndClass/.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>

Question10-InstanceAndClass/src/main/java/Calculation.java

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+
+public class Calculation {
+	int baseNum;
+		
+	
+	public void add(int num){
+		
+		baseNum = baseNum + num; 
+		
+	}
+}

Question10-InstanceAndClass/src/main/java/Q10_1.java

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+
+public class Q10_1 {
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		User user = new User();
+		
+		user.id = 1000;
+		user.name = "山田太郎";
+		
+		System.out.println(user.id);
+		System.out.println(user.name);
+		
+	}
+	
+}

Question10-InstanceAndClass/src/main/java/Q10_2.java

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+
+public class Q10_2 {
+	public static void main(String[] args) {
+		User user = new User();
+		
+		user.id = 2000;
+		user.name = "佐藤二郎";
+		
+		user.printProfile();
+		
+	}
+}

Question10-InstanceAndClass/src/main/java/Q10_3.java

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+
+public class Q10_3 {
+	public static void main(String[] args) {
+		Student student = new Student();
+		student.studentid=10;
+		student.name="田中二郎";
+		student.mail="test@mail.com";
+		student.password="pass";
+		
+		System.out.println(student.studentid);
+		System.out.println(student.name);
+		System.out.println(student.mail);
+		System.out.println(student.password);
+		
+	}
+}

Question10-InstanceAndClass/src/main/java/Q10_4.java

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+
+public class Q10_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		Calculation cal = new Calculation();
+		
+		cal.baseNum = 100;
+		
+		
+		cal.add(100);
+		
+		
+		
+		
+		
+		System.out.println(cal.baseNum);
+	}
+}

Question10-InstanceAndClass/src/main/java/Student.java

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+
+public class Student {
+	int studentid;
+	String name;
+	String mail;
+	String password;
+	
+}

Question10-InstanceAndClass/src/main/java/User.java

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+
+public class User {
+	int id;
+	String name;
+	
+	public void printProfile() {
+		System.out.println(id+":"+name);
+		
+	}
+    
+	
+}