rotate matrix in java
package Arrays; import java.util.Arrays; public class RotateMatrix { static int[][] rotate(int[][] matrix) { int rows = matrix.length; int cols = matrix[0].length; int[][] ans = new int[rows][cols]; for (int i = 0; i < rows; i++) { for (int j = 0; j < cols; j++) { ans[i][j] = matrix[j][i]; } reverse(ans[i]); } return ans; } static void reverse(int[] arr) { for (int i = 0; i < arr.length/2; i++) { int temp = arr[i]; arr[i] = arr[arr.length-i-1]; arr[arr.length-i-1] = temp; } } public static void main(String[] args) { int[][] nums = {{1, 2, 3},{4, 5, 6}, {7, 8,9}}; System.out.println(Arrays.deepToString(rotate(nums))); } }
