10/30自習

Question07-Array/src/main/java/Question07_1.java

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+
+public class Question07_1 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int[] number = new int[5];
+		number[0] = 1;
+		number[1] = 3;
+		number[2] = 5;
+		number[3] = 7;
+		number[4] = 9;
+		
+		System.out.println(number[1]);
+
+	}
+
+}

Question07-Array/src/main/java/Question07_10.java

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+import java.util.Arrays;
+
+public class Question07_10 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int[] array = new int[100];
+		for(int i = 0; i < array.length; i++) {
+			array[i] = i + 1;
+		}
+		System.out.println(Arrays.toString(array));
+
+	}
+
+}

Question07-Array/src/main/java/Question07_2.java

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+
+public class Question07_2 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int[] num = {1, 10, 100};
+		
+		System.out.println(num[0] + num[2]);
+
+	}
+
+}

Question07-Array/src/main/java/Question07_3.java

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+
+public class Question07_3 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String[] s = {"森", "山", "沼", "島", "平地"};
+		
+		for(int i = 0; i < s.length; i++) {
+			System.out.print(s[i] + ",");
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question07_4.java

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+
+public class Question07_4 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		
+		int num[] = new int[1000];
+		for(int i = 0; i <= 1000; i++) {
+			num[i] = i +1;
+			
+			System.out.println(num[i]);
+		}
+	}
+}

Question07-Array/src/main/java/Question07_5.java

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+
+
+public class Question07_5 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String[] s = {"森", "山", "沼", "島", "平地"};
+		int rand = s.length;
+		int randomIndex = (int)(Math.random() * rand);
+		
+		String rands = s[randomIndex];
+		System.out.print(rands);
+		
+
+	}
+
+}

Question07-Array/src/main/java/Question07_6.java

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+
+public class Question07_6 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String[] st = {"森", "山", "沼", "島", "平地"};
+		
+		for(int i = st.length-1; i >= 0; i--) {
+			System.out.print(st[i] + ",");
+		}
+
+	}
+
+}

Question07-Array/src/main/java/Question07_7.java

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+
+public class Question07_7 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		String[][] time = {
+				{"月", "火", "水", "木", "金"},
+				{"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", "理科"},
+				{"数学", "英語", "英語", "理科", "英語"}
+		};
+		System.out.println(time[2][4]);
+		
+
+	}
+
+}

Question07-Array/src/main/java/Question07_8.java

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+
+public class Question07_8 {
+
+	public static void main(String[] args) {
+		// TODO 自動生成されたメソッド・スタブ
+		int[][] num = {
+				{1, 3, 5, 7},
+				{11, 13, 17, 19, 23, 29}
+		};
+				for(int[] row : num ) {
+					for(int nums : row)
+					System.out.print(nums + ",");
+				
+		}
+		
+}
+
+}

Question07-Array/src/main/java/Question07_9.java

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+public class Question07_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 sum = 0;
+		int count = 0;
+		for (int i = 0; i < array.length; i++) {
+			for(int s = 0; s < array[i].length; s++) {
+				sum += array[i][s];
+				count++;
+			}
+		}
+		System.out.print((double)sum/(double)count);
+
+	}
+
+}