1次元配列
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1次元配列
コード 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"); } }
結果 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
