2 dimentional array rotate 90 degree

Question

Accepted Answer

Rotate a 2D array by 90 degrees clockwise

Transpose the array
Reverse each row of the transposed array

Accepted Answer

public class RotateArray {
    public static void main(String[] args) {
        int[][] matrix = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
        };

// Transpose the matrix
        for (int i = 0; i < matrix.length; i++) {
            for (int j = i + 1; j < matrix[i].length; j++) {
                int temp = matrix[i][j];
                matrix[i][j] = matrix[j][i];
                matrix[j][i] = temp;
            }
        }

// Reverse each row of the transposed matrix
        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[i].length / 2; j++) {
                int temp = matrix[i][j];
                matrix[i][j] = matrix[i][matrix[i].length - 1 - j];
                matrix[i][matrix[i].length - 1 - j] = temp;
            }
        }

// Print the rotated matrix
        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[i].length; j++) {
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
    }
}

2 dimentional array rotate 90 degree

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