Write a program of addition of matrix

import java.io.*;

class Matrix1

{

int row,i,j;

int col;

int n[][]=new int[10][10];

public void input()

throws IOException

{

          BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

          System.out.println("enter the order of matrix");

          row=Integer.parseInt(br.readLine());

          col=Integer.parseInt(br.readLine());

          System.out.println("enter the matrix");

          for(i=0;i<row;i++)

          {

                   for(j=0;j<col;j++)

                   {   BufferedReader cr=new BufferedReader(new InputStreamReader(System.in));

                             n[i][j]=Integer.parseInt(cr.readLine());

                   }

          }

}

          public void output()

          {

                   System.out.println("matrix is");

                   for(i=0;i<row;i++)

                             {

                                      for(j=0;j<col;j++)

                                      {

                                                System.out.print(n[i][j]+"\t");

                                      }

                                      System.out.print("\n");

          }

}

 public void sum(Matrix1 m1,Matrix1 m2)

 {

           Matrix1 t3=new Matrix1();

           row=m1.row;

           col=m1.col;

           for(i=0;i<row;i++)

                    {

                             for(j=0;j<col;j++)

                             {

                                       t3.n[i][j]=m1.n[i][j]+m2.n[i][j];

                             }

                   }

                   t3.output();

          }

}

class matmain

{

          public static void main(String[] arg)

          throws IOException

          {

                   Matrix1 m1=new Matrix1();

                   Matrix1 m2=new Matrix1();

                   Matrix1 m3=new Matrix1();

                   m1.input();

                   m2.input();

                   m1.output();

                   m2.output();

                   m3.sum(m1,m2);

          }

}