Matrix Addition using Java

import java.util.Scanner;

class MatrixAdds {
    public static void main(String args[]) {
        int m, n, i, j;
        Scanner in = new Scanner(System. in );
        System.out.println("Enter the number of rows and columns of matrix:");
        m = in .nextInt();
        n = in .nextInt();
        int first[][] = new int[m][n];
        int second[][] = new int[m][n];
        int sum[][] = new int[m][n];
        System.out.println("Enter the elements of first matrix:");
        for (i = 0; i < m; i++)
        for (j = 0; j < n; j++)
        first[i][j] = in .nextInt();
        System.out.println("Enter the elements of second matrix:");
        for (i = 0; i < m; i++)
        for (j = 0; j < n; j++)
        second[i][j] = in .nextInt();
        for (i = 0; i < m; i++)
        for (j = 0; j < n; j++)
        sum[i][j] = first[i][j] + second[i][j];
        System.out.println("Resultant matrix after addtion of two entered matrices:-");
        for (i = 0; i < m; i++) {
            for (j = 0; j < n; j++)
            System.out.print(sum[i][j] + "\t");
            System.out.println();
        }
    }
}