Q1_6.java

public class Q1_6{
  public static void main(String args[]){   
		int a[][] = {
		        {1, 2, 3, 4},
		        {5, 6, 7, 8},
		        {9, 10, 11, 12},
		        {13, 14, 15, 16}};
		 rotate(a);  
		 for(int[] x :a){
			 for(int integer :x)
				 System.out.print(integer+"  ");
			 System.out.println("  ");
		 }
  }
  static void rotate(int[][] matrix){
    int size = matrix.length;
    for(int i = 0; i <= size/2; i++){
      for(int j =i; j < size-i-1; j++){
        int temp = matrix[i][j];
        matrix[i][j] = matrix[size-1-j][i];
        matrix[size-1-j][i] = matrix[size-1-i][size-1-j];
        matrix[size-1-i][size-1-j] = matrix[j][size-1-i];
        matrix[j][size-1-i] = temp;
      }
    }
  }
}