/*
    Loops6.java
    CIS 160
    David Klick
    2004-09-17

    Demonstrates error checking in a loop
*/

import javax.swing.JOptionPane;

public class Loops6 {
    public static void main(String[] args) {
        String strIn;
        int num;
        boolean done = false;

        do {
            strIn = JOptionPane.showInputDialog("Enter an integer (Q to quit)");
            if (strIn == null) {
                System.out.println("Nothing was entered");
                continue;
            }
            System.out.println("You entered: " + strIn);
            if (strIn.equalsIgnoreCase("Q")) {
                done = true;
            } else {
                try {
                    num = Integer.parseInt(strIn);
                    System.out.println("The number is " + num);
                } catch (NumberFormatException e) {
                    System.out.println("Invalid integer entered");
                }
            }
        } while (!done);
        System.exit(0);
    }
}