rotatematrix90deg.java

public class rotatematrix90deg {
  public static void main(String[] args) {
    int arr[][] =  {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        rotate(arr);
        System.out.println("Rotated Image");
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr.length; j++) {
                System.out.print(arr[i][j] + " ");
            }
            System.out.println();
        }
  }
  public static void rotate(int matrix[][])
  {
    for (int i = 0; i < matrix.length; i++) {
      for (int j = i; j < matrix[0].length; j++) {
          int temp = 0;
          temp = matrix[i][j];
          matrix[i][j] = matrix[j][i];
          matrix[j][i] = temp;
      }
  }
  for (int i = 0; i < matrix.length; i++) 
  {
      for (int j = 0; j < matrix.length / 2; j++) 
      {
          int temp = 0;
          temp = matrix[i][j];
          matrix[i][j] = matrix[i][matrix.length - 1 - j];
          matrix[i][matrix.length - 1 - j] = temp;
      }
  }
}
}