1、数组的定义
//定义一维数组
int[] num1 = {10, 20, 30}; //“int[] num1”等价“int num1[]”，推荐使用前者写法。
int[] num2 = new int[]{40, 50, 60};
int[] num3 = new int[3];
//定义二维数组
int[][] num4 = {{10, 20, 30}, {40, 50, 60}};
int[][] num5 = new int[][]{{10, 20, 30}, {40, 50, 60}};
int[][] num6 = new int[3][5];
//定义不规则数组
int[][] num7 = {{10, 20, 30}, {40}};
int[][] num9 = new int[3][];
num9[0] = new int[5];
num9[1] = new int[4];
num9[2] = new int[3];2、数组填充
int[] num = new int[5]; Arrays.fill(num, 27);
执行结果如下图：
