Matrix Operation In JAVA

import java.io.*;
class matrixMulB
{
public static void main(String args[])throws IOException
{

String q,r,s;

int size,i,j,k,sum;

int A[][]=new int[50][50];
int B[][]=new int[50][50];
int C[][]=new int[50][50];
System.out.print("Enter matrix sizes:");
BufferedReader obj=new BufferedReader(new InputStreamReader(System.in));
q=obj.readLine();
size=Integer.parseInt(q);
System.out.print("\n");
System.out.print("\t\tMatrix A is:\n\n");
for(i=0;i {
for(j=0;j {
System.out.printf("\tThe element A[%d][%d]:",i,j);
r=obj.readLine();
A[i][j]=Integer.parseInt(r);

}
System.out.print("\n");
}
System.out.print("\t\tMatrix B is:\n\n");
for(i=0;i {
for(j=0;j {
System.out.printf("\tThe element B[%d][%d]:",i,j);

s=obj.readLine();
B[i][j]=Integer.parseInt(s);
}
System.out.print("\n");
}
System.out.print("\n\tMultiplication of A and B is:\n\n\t");
for(i=0;i {
for(j=0;j {
sum=0;
for(k=0;k sum=sum+A[i][k]*B[k][j];
C[i][j]=sum;
System.out.printf("%6d",C[i][j]);
}
System.out.print("\n\t");
}
System.out.print("\n");

}
}