Sams Teach Yourself Java in 21 Days by Rogers Cadenhead

Author:Rogers Cadenhead [Cadenhead, Rogers]
Language: eng
Format: epub
Tags: Computers & Technology, Programming, Introductory & Beginning, Languages & Tools, Java, Beginner's Guides, Software Design; Testing & Engineering, Object-Oriented Design, Computer Science, Programming Languages, Reference
ISBN: 9780672335747
Amazon: 0672335743
Publisher: Sams Publishing
Published: 2012-08-27T00:00:00+00:00

* * *

1: import java.awt.event.*;

2: import javax.swing.*;

3: import java.awt.*;

4:

5: public class TitleChanger extends JFrame implements ActionListener {

6: JButton b1;

7: JButton b2;

8:

9: public TitleChanger() {

10: super("Title Bar");

11: setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

12: setLookAndFeel();

13: b1 = new JButton("Rosencrantz");

14: b2 = new JButton("Guildenstern");

15: b1.addActionListener(this);

16: b2.addActionListener(this);

17: FlowLayout flow = new FlowLayout();

18: setLayout(flow);

19: add(b1);

20: add(b2);

21: pack();

22: setVisible(true);

23: }

24:

25: public void actionPerformed(ActionEvent evt) {

26: Object source = evt.getSource();

27: if (source == b1) {

28: setTitle("Rosencrantz");

29: } else if (source == b2) {

30: setTitle("Guildenstern");

31: }

32: repaint();

33: }

34:

35: private void setLookAndFeel() {

36: try {

37: UIManager.setLookAndFeel(

38: "com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"

39: );

40: SwingUtilities.updateComponentTreeUI(this);

41: } catch (Exception exc) {

42: System.err.println("Couldn't use the system "

43: + "look and feel: " + exc);

44: }

45: }

46:

47: public static void main(String[] arguments) {

48: TitleChanger frame = new TitleChanger();

49: }

50: }

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