public class ExerciseJOptionPane
1:
2:
3: import javax.swing.*;
4:
5: public class ExerciseJOptionPane
6: {
7: public static void main(String[] args)
8: {
9: boolean adult = false;
10: //Initialized to keep the compiler happy.
11:
12: int answer =
13: JOptionPane.showConfirmDialog(null,
14: "Are you 18 years old or older?",
15: "Age Check", JOptionPane.YES_NO_OPTION);
16: if (answer == JOptionPane.YES_OPTION)
17: adult = true;
18: else if (answer == JOptionPane.NO_OPTION)
19: adult = false;
20: else
21: System.out.println("Error");
22:
23: if (adult)
24: JOptionPane.showMessageDialog(
25: null, "You are old enough.");
26: else
27: JOptionPane.showMessageDialog(
28: null, "Sorry. you must be 18.");
29: System.exit(0);
30: }
31: }