萌新的循环打印问题,打印结果最后一行分隔符丢失了啊

public class cs {
    public static void main(String[] args) {
        int arr1[] = {11, 22, 33, 44, 55};
        int arr2[] = {11, 22, 33, 44, 55, 66};
        int arr3[] = {11, 22, 33, 44, 55, 77, 88};
        int arr4[] = {11, 22, 33, 44, 55, 99, 11, 44, 55};

        int arr0[][] = new int[4][];

        arr0[0] = arr1;
        arr0[1] = arr2;
        arr0[2] = arr3;
        arr0[3] = arr4;

        for (int i = 0; i < arr0.length; i++) {
            System.out.print("[");
            for (int j = 0; j < arr0[i].length; j++) {
                if (arr0[i][j] == arr0[i][arr0[i].length - 1]) {
                    System.out.print(arr0[i][j] );
                } else
                    System.out.print(arr0[i][j]+ ",");

            }
            System.out.print("]");
            System.out.println();
        }
    }
}

为什么打印出来会是这样啊

第四个数组55出现了2次。所以判断错误了，应该用索引判断，而不是值

// 判断值 X
if (arr0[i][j] == arr0[i][arr0[i].length - 1]) {}
// 判断索引 √
if (j == arr0[i].length - 1) {}

你的判断只是打不打“，”，“[”和“]”实在外循环中打印的