public class RotateImage {
// 耗时2ms
public void rotate(int[][] matrix) {
int n = matrix.length;
for (int i = 0; i < n / 2; i++) {
for (int j = 0; j < n; j++) {
int t = matrix[i][j];
matrix[i][j] = matrix[n - 1 - i][j];
matrix[n - 1 - i][j] = t;
}
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < i; j++) {
int t = matrix[i][j];
matrix[i][j] = matrix[j][i];
matrix[j][i] = t;
}
}
}
}