Matrix Multiplication Program in Java

import java.util.*;

import java.util.*;

public class MatrixMultiplication
{
    public static void main(String[] args)
    {
        int ar1[][] = new int[3][3];
        int ar2[][] = new int[3][3];
        int mul[][] = new int[3][3];
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter first matrix:");
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                System.out.print("Enter the number ar1[" + i + "][" + j + "]:");
                ar1[i][j] = sc.nextInt();
            }
        }
        System.out.println("Enter second matrix:");
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                System.out.print("Enter the number ar2[" + i + "][" + j + "]:");
                ar2[i][j] = sc.nextInt();
            }
        }
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                mul[i][j] = 0;
                for (int k = 0; k < 3; k++)
                {
                    mul[i][j] = mul[i][j] + (ar1[i][k] * ar2[k][j]);
                }
            }
        }
        
        System.out.println("Multiplication of Matrices:");
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                System.out.print(mul[i][j] + " ");
            }
            System.out.println();
        }
    }
}

Output:

Enter first matrix:
Enter the number ar1[0][0]:2
Enter the number ar1[0][1]:2
Enter the number ar1[0][2]:2
Enter the number ar1[1][0]:2
Enter the number ar1[1][1]:2
Enter the number ar1[1][2]:2
Enter the number ar1[2][0]:2
Enter the number ar1[2][1]:2
Enter the number ar1[2][2]:2
Enter second matrix:
Enter the number ar2[0][0]:3
Enter the number ar2[0][1]:3
Enter the number ar2[0][2]:3
Enter the number ar2[1][0]:3
Enter the number ar2[1][1]:3
Enter the number ar2[1][2]:3
Enter the number ar2[2][0]:3
Enter the number ar2[2][1]:3
Enter the number ar2[2][2]:3
Multiplication of Matrices:
18 18 18 
18 18 18 
18 18 18 
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