자바질문

[익명(116.125)]

int[][] origin = { {1, 3}, {5, 7} };

        

        System.out.println("[얕은 복제 후 비교]");

        int[][] clone1 = Arrays.copyOf(origin, origin.length);

        System.out.println("배열 번지 비교: " + origin.equals(clone1));

        System.out.println("1차 배열 항목값 비교: " + Arrays.equals(origin, clone1));

        System.out.println("중첩 배열 항목값 비교: " + Arrays.deepEquals(origin, clone1));

        

        System.out.println("\n[깊은 복제 후 비교]");

        int[][] clone2 = Arrays.copyOf(origin, origin.length);

        clone2[0] = Arrays.copyOf(origin[0], origin[0].length);

        clone2[1] = Arrays.copyOf(origin[1], origin[1].length);

        

        System.out.println("배열 번지 비교: " + origin.equals(clone2));

        System.out.println("1차 배열 항목값 비교: " + Arrays.equals(origin, clone2));

        System.out.println("중첩 배열 항목값 비교: " + Arrays.deepEquals(origin, clone2));

false

true

true

false

false

true

이렇게 나오는데 왜 나오는지 모르겠음.

equals()가 1차 항목의 값만 비교한다는데 1차 항목의 값이 뭐임...?