完了済

Question01-StartProgram/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question01-StartProgram/.gitignore

@@ -0,0 +1 @@
+/build/

Question01-StartProgram/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question01-StartProgram</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>

Question01-StartProgram/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question01-StartProgram/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question01-StartProgram/src/main/java/Question1_1.java

@@ -0,0 +1,11 @@
+
+public class Question1_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		System.out.println("`Hello,world`");
+		
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_2.java

@@ -0,0 +1,16 @@
+
+public class Question1_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//1行だけを無効化する方法
+		/*
+		複数行をまとめて無効化する方法
+		*/
+		
+		System.out.println("テスト");
+		
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_3.java

@@ -0,0 +1,16 @@
+
+public class Question1_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//変数strを宣言して代入する
+		String str;
+		str = "こんにちは";
+		
+		//出力
+		System.out.println(str);
+		
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_4.java

@@ -0,0 +1,15 @@
+
+public class Question1_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		//変数numberを値10で初期化する
+		int number = 10;
+		
+		//出力
+		System.out.println(number);
+
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_5.java

@@ -0,0 +1,15 @@
+
+public class Question1_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//変数chを値Aで初期化する
+		char ch = 'A';
+		
+		//出力
+		System.out.println(ch);
+		
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_6.java

@@ -0,0 +1,15 @@
+
+public class Question1_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//変数boを値trueで初期化する
+		boolean bo = true;
+		
+		//出力
+		System.out.println(bo);
+		
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_7.java

@@ -0,0 +1,15 @@
+
+public class Question1_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		//変数loを値1000000000000で初期化する
+		long lo = 1000000000000L;
+		
+		//出力
+		System.out.println(lo);
+
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_8.java

@@ -0,0 +1,15 @@
+
+public class Question1_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		//変数flを値3.14で初期化する
+		float fl = 3.14F;
+				
+		//出力
+		System.out.println(fl);
+
+	}
+
+}

Question01-StartProgram/src/main/java/Question1_9.java

@@ -0,0 +1,42 @@
+
+public class Question1_9 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		//変数宣言
+		boolean bl; // true or false
+		char ch; // 16ビットUnicode文字 u0000-uFFFF
+		byte by; // 8ビット整数 -128~127 (符号ビット＋2^7)
+		short sh; // 16ビット整数 -32,768~32,767 (符号ビット＋2^15)
+		int num; // 32ビット整数 -2,147,483,648~2,147,483,647 (符号ビット＋2^31)
+		long lo; // 64ビット整数 -9,223,372,036,854,775,808~9,223,372,036,854,775,807 (符号ビット＋2^63)
+		float fl; // 32ビット単精度浮動小数点数
+		double db; // 64ビット倍精度浮動小数点数
+		String str; // 文字列を扱うクラス
+		
+		//代入
+		bl = true;
+		ch = 'A';
+		by = 100;
+		sh = 10000;
+		num = 1000000000;
+		lo = 1000000000000000000L;
+		fl = 3.1415926F;
+		db = 1e2;
+		str = "DONE";
+		
+		//出力
+		System.out.println(bl);
+		System.out.println(ch);
+		System.out.println(by);
+		System.out.println(sh);
+		System.out.println(num);
+		System.out.println(lo);
+		System.out.println(fl);
+		System.out.println(db);
+		System.out.println(str);
+		
+	}
+
+}

Question02-Expressions/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question02-Expressions/.gitignore

@@ -0,0 +1 @@
+/build/

Question02-Expressions/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question02-Expressions</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>

Question02-Expressions/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question02-Expressions/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question02-Expressions/src/main/java/Question2_1.java

@@ -0,0 +1,23 @@
+
+public class Question2_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int sum, diff, mulch, div, rem;
+		
+		sum = 6 + 2;
+		diff = 6 - 2;
+		mulch = 6 * 2;
+		div = 6 / 2;
+		rem = 17 % 5;
+		
+		System.out.println("変数sum:" + sum);
+		System.out.println("変数diff:" + diff);
+		System.out.println("変数mulch:" + mulch);
+		System.out.println("変数div:" + div);
+		System.out.println("変数rem:" + rem);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_2.java

@@ -0,0 +1,14 @@
+
+public class Question2_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		String lastName = "太郎";
+		String firstName = "山田";
+		
+		System.out.println(firstName+lastName);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_3.java

@@ -0,0 +1,15 @@
+
+public class Question2_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 10;
+		
+		num = num + 5;
+		
+		System.out.println(num);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_4.java

@@ -0,0 +1,18 @@
+
+public class Question2_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		// error
+//		int sum;
+//		sum = 10 + 3.14;
+		
+		double sum;
+		sum = 10 + 3.14;
+		
+		System.out.println(sum);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_5.java

@@ -0,0 +1,15 @@
+
+public class Question2_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int age = 20;
+		int diff = 5;
+		
+		System.out.println("山田さんは"+age+"歳です。");
+		System.out.println(diff+"年後には"+(age+diff)+"歳になります。");
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_6.java

@@ -0,0 +1,14 @@
+
+public class Question2_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int numerator = 9;
+		int denominator = 2;
+		
+		System.out.println( (float)numerator/(float)denominator );
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_7.java

@@ -0,0 +1,18 @@
+
+public class Question2_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num;
+		
+		// error
+//		num = 1.0;
+		
+		num = (int)1.0;
+		
+		System.out.println(num);
+
+	}
+
+}

Question02-Expressions/src/main/java/Question2_8.java

@@ -0,0 +1,17 @@
+
+public class Question2_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int money = 1000;
+		int price = 580;
+		float taxRate = 0.08F;
+		
+		money = money - (int)( price*(1.0+taxRate) );
+		
+		System.out.println("残金は"+money+"円です。");
+
+	}
+
+}

Question03-if/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question03-if/.gitignore

@@ -0,0 +1 @@
+/build/

Question03-if/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question03-if</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>

Question03-if/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question03-if/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question03-if/src/main/java/Question3_1.java

@@ -0,0 +1,15 @@
+
+public class Question3_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 100;
+		
+		if ( num == 100 ) {
+			System.out.println("条件に合致しました");
+		} 
+
+	}
+
+}

Question03-if/src/main/java/Question3_2.java

@@ -0,0 +1,17 @@
+
+public class Question3_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 65;
+		
+		if ( num >= 65 ) {
+			System.out.println("合格です");
+		} else {
+			System.out.println("不合格です");
+		}
+		
+	}
+
+}

Question03-if/src/main/java/Question3_3.java

@@ -0,0 +1,15 @@
+
+public class Question3_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 10;
+		
+		if ( (num % 2 == 0 ) && ( num % 5 == 0 ) ) {
+			System.out.println(num+"は"+2+"でも"+5+"でも割り切れます");
+		}
+
+	}
+
+}

Question03-if/src/main/java/Question3_4.java

@@ -0,0 +1,26 @@
+import java.util.Scanner;
+
+public class Question3_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		System.out.println("降水確率を入力してください。（数字のみ）");
+		
+		Scanner sc = new Scanner(System.in);
+		int num = Integer.parseInt(sc.nextLine());
+		sc.close();
+		
+		if ( (num<0) || (num>100) ) {
+			System.out.println("不正な値が入力されました");
+		} else if ( num >= 75 ) {
+			System.out.println("雨が降る確率が高いです");
+		} else if ( (num<75) && (num>=30) ) {
+			System.out.println("雨が降るかもしれないです");
+		} else {
+			System.out.println("雨はまず降らないでしょう");
+		}
+
+	}
+	
+}

Question04-while/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question04-while/.gitignore

@@ -0,0 +1 @@
+/build/

Question04-while/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question04-while</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>

Question04-while/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question04-while/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question04-while/src/main/java/Question4_1.java

@@ -0,0 +1,15 @@
+
+public class Question4_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 0;
+		while ( num!=5 ) {
+			num = (int)( Math.random()*10 );
+			System.out.println(num);
+		}
+
+	}
+
+}

Question04-while/src/main/java/Question4_2.java

@@ -0,0 +1,15 @@
+
+public class Question4_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 2;
+		while ( num<=1000 ) {
+			num = num*2;
+		}
+		System.out.println(num);
+
+	}
+
+}

Question04-while/src/main/java/Question4_3.java

@@ -0,0 +1,18 @@
+
+public class Question4_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num = 0;
+		while ( true ) {
+			num = (int)( Math.random()*10 );
+			System.out.println(num);
+			if ( num==5 ) {
+				break;
+			}
+		}
+		
+	}
+
+}

Question04-while/src/main/java/Question4_4.java

@@ -0,0 +1,32 @@
+import java.util.Scanner;
+
+public class Question4_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int map = 50;
+		int progress = 0;
+		
+		System.out.println("===== START =====");
+		
+		while ( true ) {
+			
+			System.out.println("Enterキーを押してください。さいころをふります。");
+			Scanner sc = new Scanner(System.in);
+			String str = sc.nextLine();
+			
+			int num = (int)( Math.random()*6+1 );
+			System.out.println(num+"の目が出ました。");
+			progress = progress + num;
+			
+			if ( map-progress<=0 ) { break; }
+			System.out.println("残りのマスは"+(map-progress)+"マスです。");
+			
+		}
+		
+		System.out.println("===== GOAL =====");
+
+	}
+
+}

Question04-while/src/main/java/Question4_5.java

@@ -0,0 +1,67 @@
+import java.util.Scanner;
+
+public class Question4_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		boolean winflag = false;
+		
+		while ( !winflag ) {
+			
+			System.out.println("じゃんけんを行います。");
+			System.out.println("あなたの出す手を入力してください。");
+			System.out.println("0:グー, 1:チョキ, 2:パー");
+			
+			Scanner sc = new Scanner(System.in);
+			int playerHand = sc.nextInt();
+			switch ( playerHand ) {
+			case 0 :
+				System.out.println("あなたはグーを出しました。");
+				break;
+			case 1 :
+				System.out.println("あなたはチョキを出しました。");
+				break;
+			case 2 :
+				System.out.println("あなたはパーを出しました。");
+				break;
+//			default : 
+//				System.out.println("不正な入力です。");
+//				System.exit(0);
+			}
+			
+			int npcHand = (int)( Math.random()*3 );
+			switch ( npcHand ) {
+			case 0 :
+				System.out.println("相手はグーを出しました。");
+				break;
+			case 1 :
+				System.out.println("相手はチョキを出しました。");
+				break;
+			case 2 :
+				System.out.println("相手はパーを出しました。");
+				break;
+			}
+			
+			if ( playerHand == npcHand ) {
+				System.out.println("引き分けました。");
+				System.out.println("");
+				continue;
+			}
+			
+			if ( ((playerHand==0)&&(npcHand==2)) || 
+				 ((playerHand==1)&&(npcHand==0)) || 
+				 ((playerHand==2)&&(npcHand==1)) ) {
+				System.out.println("負けました。");
+				System.out.println("");
+				continue;
+			} else {
+				System.out.println("勝ちました。");
+				winflag = true;
+			}
+			
+		}
+		
+	}
+
+}

Question05-switch/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question05-switch/.gitignore

@@ -0,0 +1 @@
+/build/

Question05-switch/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question05-switch</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>

Question05-switch/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question05-switch/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question05-switch/src/main/java/Question5_1.java

@@ -0,0 +1,35 @@
+
+public class Question5_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+
+		System.out.println("今日の運勢を占います。");
+
+		int num = (int)( Math.random()*5+1 );
+//		System.out.println(num);
+		
+		switch (num) {
+			case 0 :
+				System.out.println("あなたの運勢は「大吉」です。");
+				break;
+			case 1 :
+				System.out.println("あなたの運勢は「吉」です。");
+				break;
+			case 2 :
+				System.out.println("あなたの運勢は「中吉」です。");
+				break;
+			case 3 :
+				System.out.println("あなたの運勢は「小吉」です。");
+				break;
+			case 4 :
+				System.out.println("あなたの運勢は「末吉」です。");
+				break;
+			case 5 :
+				System.out.println("あなたの運勢は「凶」です。");
+				break;
+		}
+		
+	}
+
+}

Question05-switch/src/main/java/Question5_2.java

@@ -0,0 +1,47 @@
+import java.util.Scanner;
+
+public class Question5_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		
+		int num1, num2;
+		String choice;
+		Scanner sc = new Scanner(System.in);
+		
+		System.out.println("1つ目の数値を入力してください");
+		num1 = sc.nextInt();
+		
+		System.out.println("２つ目の数値を入力してください");
+		num2 = sc.nextInt();
+		
+		System.out.println("計算方法を選択してください");
+		choice = sc.next();
+		
+		sc.close();
+		
+		switch (choice) {
+			case "+" :
+				System.out.println(num1+num2);
+				break;
+			case "-" :
+				System.out.println(num1-num2);
+				break;
+			case "*" :
+				System.out.println(num1*num2);
+				break;
+			case "/" :
+				System.out.println((double)num1/(double)num2);
+				break;
+			case "%" :
+				System.out.println(num1%num2);
+				break;
+			default :
+				System.out.println("計算に失敗しました");
+				break;
+		}
+
+	}
+
+}

Question05-switch/src/main/java/Question5_3.java

@@ -0,0 +1,67 @@
+import java.util.Scanner;
+
+public class Question5_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		System.out.println("=========================================\n"
+				+ "               ゲームの説明\n"
+				+ "=========================================\n"
+				+ "これからハイ＆ローゲームを行います。\n"
+				+ "ハイ＆ローゲームは、あなたのカードがディーラーのカードより大きいか小さいかを予想するゲームです。\n"
+				+ "\n"
+				+ "=========================================\n"
+				+ "               ゲーム開始\n"
+				+ "=========================================");
+		
+		int dealerCard = (int)( Math.random()*12+1 );
+//		dealerCard = ;
+		System.out.println("ディーラーのカードは"+dealerCard+"です");
+		
+		int myCard = (int)( Math.random()*12+1 );
+//		myCard = ;
+		
+		System.out.println("");
+		
+		System.out.println("あなたのカードがディーラのカードより大きい場合は H 小さい場合は L を入力してください。");
+		System.out.println("※ カードの数値が同じ場合はあなたの勝ちです。");
+		
+		String jedgement;
+		Scanner sc = new Scanner(System.in);
+		jedgement = sc.next();
+		sc.close();
+		
+		System.out.println("あなたのカードは"+myCard+"です");
+		
+		System.out.println("");
+		
+		System.out.println("=========================================\n"
+				+ "               勝敗判定\n"
+				+ "=========================================");
+		
+		switch (jedgement) {
+			case "H" : 
+				if (myCard>=dealerCard) {
+					System.out.println("あなたの勝ちです");
+					break;
+				} else {
+					System.out.println("あなたの負けです");
+					break;
+				}
+			case "L" :
+				if (myCard<=dealerCard) {
+					System.out.println("あなたの勝ちです");
+					break;
+				} else {
+					System.out.println("あなたの負けです");
+					break;
+				}
+			default :
+				System.out.println("不正な値が入力されました");
+				break;
+		}
+
+	}
+
+}

Question06-for/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question06-for/.gitignore

@@ -0,0 +1 @@
+/build/

Question06-for/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question06-for</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>

Question06-for/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question06-for/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question06-for/src/main/java/Question6_1.java

@@ -0,0 +1,13 @@
+
+public class Question6_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		for ( int i = 0 ; i<100 ; i++ ) {
+			System.out.println(i);
+		}
+
+	}
+
+}

Question06-for/src/main/java/Question6_2.java

@@ -0,0 +1,20 @@
+
+public class Question6_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		StringBuilder square = new StringBuilder();
+		for ( int i=0 ; i<5 ; i++ ) {
+			square.append('\u25A0'); // ■ = \u25A0
+		}
+		System.out.println(square);
+		
+		// 1009
+		for ( int i=0 ; i<5 ; i++ ) {
+			System.out.print("\u25A0");
+		}
+
+	}
+
+}

Question06-for/src/main/java/Question6_3.java

@@ -0,0 +1,15 @@
+
+public class Question6_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		for ( int i = 0 ; i<=100 ; i++ ) {
+			if ( i%2 == 0 ) {
+				System.out.println(i);
+			}
+		}
+
+	}
+
+}

Question06-for/src/main/java/Question6_4.java

@@ -0,0 +1,24 @@
+
+public class Question6_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		for ( int i = 1 ; i<50 ; i++ ) {
+			
+			if ( (i%3 == 0) && (i%5 == 0) ) {
+				System.out.println("fizzbuzz");
+				continue;
+			} else if ( i%3==0 ) {
+				System.out.println("fizz");
+			} else if ( i%5==0 ) {
+				System.out.println("buzz");
+			} else {
+				System.out.println(i);
+			}
+			
+		}
+
+	}
+
+}

Question06-for/src/main/java/Question6_5.java

@@ -0,0 +1,22 @@
+
+public class Question6_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+			
+		int rand;
+		for ( int i = 0 ; i<10 ; i++) {
+			
+			rand = (int)( Math.random()*3 );
+			
+			if ( rand==2 ) {
+				// no output
+			} else {
+				System.out.println(rand);
+			}
+			
+		}
+
+	}
+
+}

Question06-for/src/main/java/Question6_6.java

@@ -0,0 +1,25 @@
+
+public class Question6_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		StringBuilder square = new StringBuilder();
+		for ( int i=0 ; i<5 ; i++ ) {
+			square.append('\u25A0'); // ■ = \u25A0
+		}
+		for ( int i=0 ; i<5 ; i++ ) {
+			System.out.println(square);
+		}
+
+		// 1009
+		for (int j=0 ; j<5 ; j++ ) {
+			for ( int i=0 ; i<5 ; i++ ) {
+				System.out.print("\u25A0");
+			}
+			System.out.println("");
+		}
+		
+	}
+
+}

Question06-for/src/main/java/Question6_7.java

@@ -0,0 +1,31 @@
+
+public class Question6_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		StringBuilder sb = new StringBuilder();
+		for ( int i=1 ; i<=9 ; i++ ) {
+			for ( int j=1 ; j<=9 ; j++ ) {
+				if ( j>=2 ) {
+					sb.append(" "); // *2以降には空白を追加する
+				}
+				sb.append(i*j); // 計算結果を文字列として追加していく
+			}
+			System.out.println(sb);
+			sb.delete(0,sb.length()); // 追記した文字列をクリアする
+		}
+		
+		// 1009
+		for ( int i=1 ; i<=9 ; i++ ) {
+			for ( int j=1 ; j<=9 ; j++ ) {
+				System.out.print(i*j);
+				if ( j==9 ) { continue; }
+				System.out.print(" ");
+			}
+			System.out.println("");
+		}
+
+	}
+
+}

Question07-Array/.classpath

@@ -0,0 +1,6 @@
+<?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>

Question07-Array/.gitignore

@@ -0,0 +1 @@
+/build/

Question07-Array/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Question07-Array</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>

Question07-Array/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+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

Question07-Array/.settings/org.eclipse.wst.common.project.facet.core.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

Question07-Array/src/main/java/Question7_1.java

@@ -0,0 +1,18 @@
+
+public class Question7_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int nums[] = new int[5];
+		nums[0] = 1;
+		nums[1] = 3;
+		nums[2] = 5;
+		nums[3] = 7;
+		nums[4] = 9;
+		
+		System.out.println(nums[1]);
+
+	}
+
+}

Question07-Array/src/main/java/Question7_10.java

@@ -0,0 +1,21 @@
+
+public class Question7_10 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int[] nums = new int[100];
+		
+		// ArrayIndexOutOfBoundException
+//		for ( int i=1 ; i<=100 ; i++ ) {
+//			nums[i] = i+1;
+//		}
+		
+		for ( int i=0 ; i<100 ; i++ ) {
+			nums[i] = i+1;
+			System.out.println(nums[i]);
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question7_2.java

@@ -0,0 +1,13 @@
+
+public class Question7_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int[] nums = {1 ,10, 100};
+		
+		System.out.println(nums[0]+nums[2]);
+
+	}
+
+}

Question07-Array/src/main/java/Question7_3.java

@@ -0,0 +1,15 @@
+
+public class Question7_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		String[] str = {"森","山","沼","島","平地"};
+		
+		for ( int i=0 ; i<str.length ; i++ ) {
+			System.out.println(str[i]);
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question7_4.java

@@ -0,0 +1,16 @@
+
+public class Question7_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int nums[] = new int[1000];
+		
+		for ( int i=1 ; i<=nums.length ; i++ ) {
+			nums[i-1] = i;
+			System.out.println(nums[i-1]);
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question7_5.java

@@ -0,0 +1,14 @@
+
+public class Question7_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		String[] str = {"森","山","沼","島","平地"};
+		
+		int num = (int)( Math.random()*5 );
+		System.out.println(str[num]);
+		
+	}
+
+}

Question07-Array/src/main/java/Question7_6.java

@@ -0,0 +1,14 @@
+
+public class Question7_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		String[] str = {"森","山","沼","島","平地"};
+		for ( int i=str.length ; i>0 ; i-- ) {
+			System.out.println(str[i-1]);
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question7_7.java

@@ -0,0 +1,19 @@
+
+public class Question7_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		String[][] table = {
+				{"国語","社会","国語","理科","社会"},
+				{"英語","数学","英語","数学","国語"},
+				{"理科","国語","理科","国語","理科"},
+				{"社会","社会","数学","社会","数学"},
+				{"数学","英語","英語","理科","英語"}
+		};
+		
+		System.out.println(table[1][4]);
+
+	}
+
+}

Question07-Array/src/main/java/Question7_8.java

@@ -0,0 +1,20 @@
+
+public class Question7_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int[][] array = {
+				{1,3,5,7},
+				{11,13,17,19,23,29}
+		};
+		
+		for ( int i=0 ; i<array.length ; i++) {
+			for ( int j=0 ; j<array[i].length ; j++ ) {
+				System.out.println(array[i][j]);
+			}
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question7_9.java

@@ -0,0 +1,24 @@
+
+public class Question7_9 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int[][] array = {
+				{1,3,5,7},
+				{11,13,17,19,23,29}
+		};
+		
+		int count=0;
+		double sum=0;
+		for ( int i=0 ; i<array.length ; i++) {
+			for ( int j=0 ; j<array[i].length ; j++ ) {
+				sum += array[i][j];
+				count++;
+			}
+		}
+		System.out.println(sum/count);
+
+	}
+
+}

Question08-Method/.classpath

@@ -0,0 +1,6 @@
+<?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

@@ -0,0 +1 @@
+/build/

Question08-Method/.project

@@ -0,0 +1,23 @@
+<?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

@@ -0,0 +1,9 @@
+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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

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

@@ -0,0 +1,15 @@
+
+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

@@ -0,0 +1,15 @@
+
+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 name ) {
+		System.out.println("こんにちは。"+name+"です。");
+	}
+
+}

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

@@ -0,0 +1,18 @@
+
+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;
+		str = hello();
+		
+		System.out.println(str);
+
+	}
+	
+	public static String hello() {
+		return "こんにちは";
+	}
+
+}

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

@@ -0,0 +1,20 @@
+
+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 sum;
+		int x = 1;
+		int y = 2;
+		
+		sum = sum(x,y);
+		System.out.println(sum);
+
+	}
+	
+	public static int sum( int x, int y ) {
+		return x+y;
+	}
+
+}

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

@@ -0,0 +1,27 @@
+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
+		
+		int num1, num2;
+		Scanner sc = new Scanner(System.in);
+		
+		System.out.println("1つ目の数値を入力してください");
+		num1 = sc.nextInt();
+		
+		System.out.println("2つ目の数値を入力してください");
+		num2 = sc.nextInt();
+		
+		sc.close();
+		
+		System.out.println(sum(num1,num2));
+
+	}
+	
+	public static int sum( int x, int y ) {
+		return x+y;
+	}
+
+}

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

@@ -0,0 +1,24 @@
+
+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(array[0]);
+		System.out.println(array[1]);
+		
+	}
+	
+	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

@@ -0,0 +1,30 @@
+
+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(10.1F);
+		printValue('A');
+
+	}
+	
+	public static void printValue( String arg ) {
+		System.out.println("引数は"+arg+"です");
+	}
+	
+	public static void printValue( int arg ) {
+		System.out.println("引数は"+arg+"です");
+	}
+
+	public static void printValue( float arg ) {
+		System.out.println("引数は"+arg+"です");
+	}
+
+	public static void printValue( char arg ) {
+		System.out.println("引数は"+arg+"です");
+	}
+
+}

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

@@ -0,0 +1,25 @@
+
+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
+		
+		System.out.println(sum(1,2));
+		System.out.println(sum(1,2,3));
+		System.out.println(sum(1,2,3,4));
+
+	}
+	
+	public static int sum( int x1, int x2 ) {
+		return x1+x2;
+	}
+	
+	public static int sum( int x1, int x2, int x3 ) {
+		return x1+x2+x3;
+	}
+	
+	public static int sum( int x1, int x2, int x3, int x4 ) {
+		return x1+x2+x3+x4;
+	}
+	
+}

Question10-InstanceAndClass/.classpath

@@ -0,0 +1,6 @@
+<?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

@@ -0,0 +1 @@
+/build/

Question10-InstanceAndClass/.project

@@ -0,0 +1,23 @@
+<?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

@@ -0,0 +1,9 @@
+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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="21"/>
+</faceted-project>

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

@@ -0,0 +1,10 @@
+
+public class Calculation {
+	
+	int baseNum;
+	
+	public void add(int num) {
+		this.baseNum += num;
+	}
+	
+}