IOapalooza1.java

/*
    IOapalooza1.java
    CIS 260
    David Klick
    2006-01-18

This program demonstrates simple console I/O using an
    InputStreamReader and a PrintStream. It also demonstrates
    a simple input loop and basic data validation.
*/

import java.io.*;

public class IOapalooza1 {
    public static void main(String[] args) throws IOException {
        InputStreamReader istrm = new InputStreamReader(System.in);
        BufferedReader kbd = new BufferedReader(istrm);
        System.out.print("Enter an integer (QUIT to exit): ");
        String strIn = kbd.readLine();
        int sum = 0;
        while (! strIn.equalsIgnoreCase("QUIT")) {
            try {
                int num = Integer.parseInt(strIn);
                sum += num;
            } catch (NumberFormatException e) {
                System.out.println("Illegal integer");
            }
            System.out.print("Enter an integer (QUIT to exit): ");
            strIn = kbd.readLine();
        }
        System.out.println("The total is " + sum);
    }
}