public class RotateImage {	public void rotate(int[][] matrix)	{		if(matrix.length == 1 && matrix[0].length == 1)		{			return;		}		int n = matrix.length;		for(int i = 0; i < n-1; i ++)		{			for(int j = i; j < n-1-i; j ++)			{				int temp = matrix[i][j];				matrix[i][j] = matrix[n-1-j][i];				matrix[n-1-j][i] = matrix[n-1-i][n-1-j];				matrix[n-1-i][n-1-j] = matrix[j][n-1-i];				matrix[j][n-1-i] = temp;			}		}	}		public static void main(String[] args) 	{		RotateImage ri = new RotateImage();		int[][] a = {
    {1,2,3},{4,5,6},{7,8,9}};		ri.rotate(a);		//ri.rotate(a);		//ri.rotate(a);		//ri.rotate(a);		for (int[] is : a) 		{			for (int i : is)			{				System.out.print(i+" ");			}			System.out.println("\n\r");		}	}}