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1次元配列


public class array {

	public static void main(String[] args) {
		
		System.out.println("Start");
		
		//
		System.out.println("------------------------");
			
			int x[] = new int[5];
			
			System.out.println("x.length - " + x.length);
			
		//
		System.out.println("------------------------");
			
			int y[] = {1,2,3,4,5};
			
			System.out.println("y.length - " + y.length);
			
		//
		System.out.println("------------------------");
			
			int z1[] = new int[3];
			
			z1[0] = 1;
			z1[1] = 2;
			z1[2] = 3;
			
			int z2[] = new int[3];
			
			//同一のインスタンスを参照する事になる
			z2 = z1;
			
			System.out.println("z2[0] -> " + z2[0]);
			System.out.println("z2[1] -> " + z2[1]);
			System.out.println("z2[2] -> " + z2[2]);
			
			z1[0] = 10;
			z1[1] = 20;
			z1[2] = 30;
			
			System.out.println("代入後");		
							
			System.out.println("z1[0] -> " + z1[0]);
			System.out.println("z1[1] -> " + z1[1]);
			System.out.println("z1[2] -> " + z1[2]);
			
			System.out.println("z2[0] -> " + z2[0]);
			System.out.println("z2[1] -> " + z2[1]);
			System.out.println("z2[2] -> " + z2[2]);
			
		System.out.println("End");
	}
}


Start
------------------------
x.length - 5
------------------------
y.length - 5
------------------------
z2[0] -> 1
z2[1] -> 2
z2[2] -> 3
代入後
z1[0] -> 10
z1[1] -> 20
z1[2] -> 30
z2[0] -> 10
z2[1] -> 20
z2[2] -> 30
End

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