打印W图案

 1 @Test
 2     /**
 3      * 测试打印w图案
 4      */
 5     public void testPrintW() {
 6         int[][] arr = new int[3][9];
 7         // 初始化x，y
 8         int x = 2;
 9         int y = 0;
10         boolean flag = false;
11         for (int i = 1; i < 10; i++) {
12             arr[x][y] = i;
13 
14             y++; // y轴一直是递增
15 
16             if (!flag) {
17                 x++;
18             }
19             if (flag) {
20                 x--;
21             }
22             if (x < 0) {
23                 x = x + 2;
24                 flag = !flag;
25             }
26             if (x > 2) {
27                 x = x - 2;
28                 flag = !flag;
29             }
30         }
31         for (int i = 0; i < arr.length; i++) {
32             for (int j = 0; j < arr[i].length; j++) {
33                 if (arr[i][j] == 0) {
34                     System.out.print(" ");
35                 } else {
36                     System.out.print(arr[i][j]);
37                 }
38             }
39             System.out.println();
40         }
41     }