Object Oriented Programming Through Java by Pearson

10.14 Graphics Using Swing Components

Example 10.9: Program to demonstrate JComboBox class

1. import javax.swing.*;

2. public class SwingDemo {

3. public static void main(String[] args) {

4. JFrame frame = new DisplayFrame();

5. frame.setVisible(true);

6. }

7. }

8. class DisplayFrame extends JFrame{

9. DisplayFrame(){

10. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

11. setTitle(“Swing Demo”);

12. setSize(300, 150);

13. setLocation(100,100);

14. JPanel panel = new DisplayPanel();

15. getContentPane().add(panel);

16. }

17. }

18. class DisplayPanel extends JPanel{

19. DisplayPanel() {

20. String[] cities = { “Delhi”, “London”, “New York”, ...