生产螺旋二维数组

public class SpiralArray {

    public static int[][] generateSpiralArray(final int x, final int y) {
        int[][] blanks = new int[x][y];
        int direct = 0;
        int num = 0;
        int posX = 0, posY = -1;
        int widthlen = y;
        int heightlen = x;
        int xTimes = heightlen;
        int yTimes = widthlen;
        while (true) {
            if (num == x * y)
                break;
            num++;
            switch (direct) {
            case 0:
                if (--yTimes == 0) {
                    direct = 1;
                    heightlen--;
                    posY++;
                    xTimes = heightlen;
                    break;
                }
                posY++;
                break;
            case 1:
                if (--xTimes == 0) {
                    direct = 2;
                    widthlen--;
                    posX++;
                    yTimes = widthlen;
                    break;
                }
                posX++;
                break;
            case 2:
                if (--yTimes == 0) {
                    direct = 3;
                    heightlen--;
                    posY--;
                    xTimes = heightlen;
                    break;
                }
                posY--;
                break;
            case 3:
                if (--xTimes == 0) {
                    direct = 0;
                    widthlen--;
                    posX--;
                    yTimes = widthlen;
                    break;
                }
                posX--;
                break;
            }
            blanks[posX][posY] = num;
            printArray(blanks, x, y);
        }
        return blanks;
    }

    priavte static void printArray(final int[][] array, final int x, final int y) {
        for (int i = 0; i < x; i++) {
            for (int j = 0; j < y; j++) {
                System.out.printf("%-5d", blanks[i][j]);
            }
            System.out.println();
        }

          try {
              Thread.sleep(100);
          } catch (InterruptedException e) {}

          System.out.println();

    }

    public static void main(String[] args) {
        int x = 5, y = 4;
        int[][] array = generateSpiralArray(x, y);
        printArray(array, x, y);
    }

}