1030自主学習

Question08-Method/.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>

Question08-Method/.gitignore

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+/build/

Question08-Method/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question08-Method</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>

Question08-Method/.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

Question08-Method/.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>

Question08-Method/src/main/java/Question8_1.java

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+
+public class Question8_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		hello();
+	}
+
+	public static void hello() {
+		System.out.println("こんにちは");
+	}
+}

Question08-Method/src/main/java/Question8_2.java

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+
+public class Question8_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		hello("山田");
+	}
+
+	public static void hello(String str) {
+		System.out.println("こんにちは" + str + "です");
+	}
+}

Question08-Method/src/main/java/Question8_3.java

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+
+public class Question8_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String str = hello();
+		System.out.println(str);
+	}
+
+	public static String hello() {
+		return "こんにちは";
+	}
+}

Question08-Method/src/main/java/Question8_4.java

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+
+public class Question8_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int total = 0;
+		total = sum(1, 2);
+		System.out.println(total);
+	}
+
+	public static int sum(int x, int y) {
+		return x + y;
+	}
+}

Question08-Method/src/main/java/Question8_5.java

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+import java.util.Scanner;
+
+public class Question8_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		System.out.println("1つ目の数値を入力してください");
+		Scanner sc = new Scanner(System.in);
+		int num1;
+		num1 = sc.nextInt();
+		System.out.println(num1);
+		
+		System.out.println("2つ目の数値を入力してください");
+		int num2;
+		num2 = sc.nextInt();
+		System.out.println(num2);
+		
+		int total = 0;
+		total = sum(num1, num2);
+		System.out.println(total);
+	}
+	
+	public static int sum(int num1, int num2) {
+		return num1 + num2;
+	}
+
+}

Question08-Method/src/main/java/Question8_6.java

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+import java.util.Arrays;
+
+public class Question8_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int[] array = addArray(10, 20);
+		System.out.println(Arrays.toString(array));
+	}
+
+	public static int[] addArray(int x, int y) {
+		int[] array = new int[2];
+		array[0] = x;
+		array[1] = y;
+		return array;
+	}
+}

Question08-Method/src/main/java/Question8_7.java

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+
+public class Question8_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		printValue("こんにちは");
+		printValue("100");
+		printValue("10.1");
+		printValue("A");
+	}
+
+	public static void printValue(String str) {
+		System.out.println("引数は" + str + "です");
+	}
+	
+	public static void printValue(int i) {
+		System.out.println("引数は" + i + "です");
+	}
+	
+	public static void printValue(float f) {
+		System.out.println("引数は" + f + "です");
+	}
+	
+	public static void printValue(char ch) {
+		System.out.println("引数は" + ch + "です");
+	}
+}

Question08-Method/src/main/java/Question8_8.java

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+
+public class Question8_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int total = 0;
+		total = sum(1, 2);
+		System.out.println(total);
+		
+		total = sum(1, 2, 3);
+		System.out.println(total);
+		
+		total = sum(1, 2, 3, 4);
+		System.out.println(total);
+		
+	}
+	
+	public static int sum(int... numbers) {
+		int total = 0;
+		for(int n : numbers) {
+			total += n;
+		}
+		return total;
+	}
+}