矩阵的旋转

    突然记起考研时上机测试的一道编程题，要把矩阵旋转90,180,270度并输出，当时比较紧张答得不是很理想，所以花几分钟重新写了一个测试的例子

public class Test {

    public static void main(String[] args) {
        int src[][] = new int[5][5];
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 5; j++) {
                src[i][j] = i * 5 + j + 1;
            }
        }
        prientArrayp(src);
        prientArrayp(rotate(src, 90));
        prientArrayp(rotate(src, 180));
        prientArrayp(rotate(src, 270));
    }

    static int[][] rotate(int[][] src, int degree) {
        System.out.println("rotate" + degree);
        int temp[][] = new int[5][5];
        switch (degree) {
        case 90:
            for (int i = 0; i < 5; i++) {
                for (int j = 0; j < 5; j++) {
                    temp[i][4 - j] = src[j][i];
                }
            }
            break;
        case 180:
            for (int i = 0; i < 5; i++) {
                for (int j = 0; j < 5; j++) {
                    temp[4 - i][4 - j] = src[i][j];
                }
            }
            break;
        case 270:
            for (int i = 0; i < 5; i++) {
                for (int j = 0; j < 5; j++) {
                    temp[4 - i][j] = src[j][i];
                }
            }
            break;
        }

        return temp;
    }

    private static void prientArrayp(int[][] p) {
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 5; j++) {
                System.out.print(p[i][j]);
                System.out.print(" ");
                if (p[i][j] < 10) {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
        System.out.println();
    }

}

    运行程序输出结果如下：