Rotate Matrix

RotateMatrix.java

public class Solution {
    public void rotate(int[][] matrix) {
        int n = matrix.length-1;
        if (n == 0) return;
        
        for (int i = 0; i <= n/2; i++){
            for (int j = i; j < n-i; j++){
                int temp = matrix[i][j];
                matrix[i][j] = matrix[n-j][i];
                matrix[n-j][i] = matrix[n-i][n-j];
                matrix[n-i][n-j] = matrix[j][n-i];
                matrix[j][n-i] = temp;
            }
        }
        
    }
}