数组输出的三种方式

1. 传统方式

int[] num = {1, 8, 7, 5, 6, 9, 2, 3};
for(int i=0; i<num.length; i++) {
  System.out.print(num[i] + " ");
}

2. for each 循环

int[] num = {1, 8, 7, 5, 6, 9, 2, 3};
for(int element: num)
  System.out.print(element + " ");

3. Arrays.toString() 方法

int[] num = {1, 8, 7, 5, 6, 9, 2, 3};
System.out.println(Arrays.toString(num));

• 二维数组输出方法类似
  参考文章：https://blog.csdn.net/chenkaibsw/article/details/78989459