Example: Rotate Matrix 90 Degrees Clockwise in Java language using Function

// Rotate Matrix 90 Degrees Clockwise in Java language using Function
import java.util.Scanner;

public class Main {
    private static int count = 4;

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Main main = new Main();

        int arru[][] = {
            {53, 33, 77, 51},
            {25, 26, 27, 28},
            {29, 20, 21, 31},
            {33, 34, 35, 36}
        };

        System.out.println("-----The input matrix before 90 degrees clock-wise rotation-----\n");
        main.printMatrix(arru);

        // this will be rotate each element clock-wise
        main.rotate90DegClockwise(arru);

        System.out.println("\n-----The matrix after 90 degrees clock-wise rotation-----\n");
        printMatrix(arru);
    }

    // This is the function to rotate the matrix 90 degree clock-wise
    private static void rotate90DegClockwise(int a[][]) {

        // It will traverse the each cycle
        for (int i = 0; i < count / 2; i++) {
            for (int j = i; j < count - i - 1; j++) {
     
                // This will swap elements of each cycle in clock-wise direction
                int temp = a[i][j];
                a[i][j] = a[count - 1 - j][i];
                a[count - 1 - j][i] = a[count - 1 - i][count - 1 - j];
                a[count - 1 - i][count - 1 - j] = a[j][count - 1 - i];
                a[j][count - 1 - i] = temp;
            }
        }
    }

    // This is the function for print the rotated matrix
    private static void printMatrix(int arr[][]) {
        for (int i = 0; i < count; i++) {
            System.out.print("\t");
            for (int j = 0; j < count; j++)
                System.out.print(arr[i][j] + "\t");
            System.out.println("\n");
        }
    }
}