Object Oriented Programming Through Java by Pearson

10.6 Graphics Using Swing Components

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. //Widgets will be added here

21. }

22. }

The code of Example 10.3 is almost similar to Example 10.2. The output shown is also the

same. In the preceding example, we instantiate the DisplayPanel object in line 14. The

constructor for DisplayPanel is presently empty, but going forward as we will see in

subsequent examples all the widget ...