Core java Selenium Software Testing

import java.io.*;

public class Assign1 

{

public void calc() throws IOException

{

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

System.out.println("Enter operator");

String o=brr.readLine().trim();

System.out.println("Enter value of a");

// String a=brr.readLine();

int a1=Integer.parseInt(brr.readLine().trim());

System.out.println("Enter value of b");

// String b=brr.readLine();

int b1=Integer.parseInt(brr.readLine().trim());

int res = 0;

if(o.equals("+"))

{

res = a1+b1;

}

else if(o.equals("-"))

{

res = a1-b1;

}

System.out.println(res);

}

public static void main(String[] args) throws IOException

{

Assign1 add=new Assign1();

add.calc();

}

}