A first GUI - An Introduction to Graphical User Interfaces with Java Swing - page 30

9. public class CounterPanel extends JPanel {
10.
11.

private CounterModel counter;

12.

private JLabel valueLabel;

13.
14.

public CounterPanel() {

15.

counter = new CounterModel();

16.
17.

BorderLayout bordLay = new BorderLayout();

18.

this. setLayout(bordLay);

19.
20.

JButton upButton = new JButton("Up");

21.

JButton downButton = new JButton("Down");

22.

valueLabel = new JLabel(""+counter.getValue(),SwingConstants.CENTER);

23.
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this .add(upButton,BorderLayout.WEST);

25. this .add(downButton,BorderLayout.EAST);

26. this .add(valueLabel,BorderLayout.CENTER);

27.
28.

// The next three lines will later be used to incorporate
// the listener.

29. // CounterListener countList = new CounterListener(this);

30.

// upButton.addActionListener(countList);

31.

// downButton.addActionListener(countList);

32. }
33.
34. public void increment(){
35.

counter.increment();

36.

valueLabel.setText(""+counter.getValue());

37. }
38.
39. public void decrement(){
40.

counter.decrement();

41.

valueLabel.setText(""+counter.getValue());

42. }
43. }

File: its/CounterGUI/CounterFrame.java

1. package its.CounterGUI;
2.
3. import javax.swing.JFrame;
4. import java.awt.BorderLayout;
5. import its.SimpleFrame.SimpleFrame;
6.