请问continue

/*  1   2   3   4  5 * 14  15  16  17  6 * 13  20  19  18  7 * 12  11  10   9  8     4X5螺旋数组*/public class Helix {    public static void main(String[] args) {        int n = 4;        int m = 5;        int [][] data = new int[n][m];        final int UP = 0;        final int DOWN = 1;        final int LEFT = 2;        final int RIGHT = 3;        int dire = RIGHT;   // 当前数字的移动方向         int value = 1; // 数组元素的值        int row = 0;       // 行下标        int col = 0;       // 列下标        data[0][0] = 1;                while (value < n*m) {            switch(dire) {                case RIGHT:                    col++;        //移动到后一列                    if (col >= m) {                        col--;                              dire = DOWN;                        continue;                    }else if(data[row][col] != 0) { // 已赋值                        col--;                        dire = DOWN;                        continue;                    }                    break;                case DOWN:                    row++;                    if (row >= n) {                        row--;                        dire = LEFT;                        continue;                    }                    else if(data[row][col] != 0) {                        row--;                        dire = LEFT;                        continue;                    }                    break;                case LEFT:                    col--;                    if (col < 0) {                        col++;                        dire = UP;                        continue;                    }else if(data[row][col] != 0) {                        col--;                        dire = UP;                        continue;                    }                    break;                case UP:                    row--;                    if (data[row][col] != 0) {                        row++;                        dire = RIGHT;                        continue;                    }                    break;            }            value++; //数值增加1            data[row][col] = value;//赋值           }                for(int i = 0;i < data.length;i++){                 for(int j = 0;j < data[i].length;j++){                          if(data[i][j] < 10){//右对齐                                    System.out.print(' ');                          }                          System.out.print(data[i][j]);                          System.out.print(' ');                 }                 System.out.println();        }    }}