Problem with entering integer numbers from keyboard

Question

I have written this simple code:
import java.io.*;
public class Simple{
     public static void main(String[] args)throws Exception{
          System.out.println("Enter two integer numbers: ");
          BufferedReader enter=new BufferedReader(new InputStreamReader(System.in));
               int first=Integer.parseInt(enter.readLine());
               int second=Integer.parseInt(enter.readLine());
          System.out.println("Result is: "+(first+second));
and it works fine if I type first number, press Enter, then type
second number and press Enter.
But if I type in one line: 2 3 (with space between) I get run-time error:
Exception in thread "main"...bla...bla at java.lang.Integer.parseInt(Integer.java)...
I know that error is coming from Integer.parseInt(string) in my code, but I
don't know how can I avoid it.
In C that is rather simple scanf("%d %d",&first,&second), but in Java it's much more
complicated.
Do you have any suggestions how to solve this problem?

Answer 1

store the user input in a string
use a StringTokenizer st
then
while(st.hasNext())
int first=Integer.parseInt(st.nextToken());
but you should really catch a NumberFormatException
walker