这样写错在哪里？

Question

public static void main(String[] args) {int[] a = {5,2,33,31,54};Dome01 test = new Dome01();System.out.println(test.and(a));}public int[] and(int[] array){Arrays.sort(array);return array;}运行结果：[I@19e0bfd

Answer 1

//遍历一下数组a输出,在输出试试

public static void main(String[] args) {

    int[] a = { 5, 2, 33, 31, 54 };

    Dome01 test = new Dome01 ();

    test.and(a);

    for (int i = 0; i < a.length; i++) {

        System.out.print(a[i] + ",");

    }

}

public int[] and(int[] array) {

    Arrays.sort(array);

    return array;

}