Rotate Image

You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Solution:

public 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; } } }