Java 12 - add matrix

import java.util.*;
class LabTask12 
{ 
static int i,j,rows,cols;
public static void main(String... args) 
{ 
Scanner sc=new Scanner(System.in);
System.out.print("Enter the no.of rows: ");
rows=sc.nextInt();
System.out.print("Enter the no.of columns: ");
cols=sc.nextInt();
int sum[][]=new int[rows][cols];
System.out.println("Enter first matrix elements:");
int a[][]=new int[rows][cols];
for(i=0;i<rows;i++){
for(j=0;j<cols;j++){
a[i][j]=sc.nextInt();
} 
} 
System.out.println("Enter second matrix elements:");
int b[][]=new int[rows][cols];
  for(i=0;i<rows;i++){
for(j=0;j<cols;j++){
b[i][j]=sc.nextInt();
} 
} 
for(i=0;i<rows;i++){
for(j=0;j<cols;j++){
sum[i][j]=a[i][j]+b[i][j];
} 
} 
System.out.println("The resultant matrix is:");
for(i=0;i<rows;i++){
for(j=0;j<cols;j++)
System.out.print(sum[i][j]+"\t");
System.out.println();
} 
} 
}