Java tutorial
import java.util.Scanner; public class Main { public static void main(String[] ap) { int val; try { Scanner sc = new Scanner(System.in); // Requires J2SE 1.5 val = sc.nextInt(); } catch (NumberFormatException ex) { System.err.println("Not a valid number: " + ex); return; } System.out.println("I read this number: " + val); } }