Solutions to selected exercises - An Introduction to Graphical User Interfaces with Java Swing - page 284

6.

LightFrame lf = new LightFrame(lm);

7.

lf.showIt();

8.

}

9. }

A.2.2 4.3

Here is the code in a non-model-view implementation. It is also in one file and
not documented. It works, but one should not program Java like this.

File: its/ColorSelection/ColorSelectionFrame.java

1. package its.ColorSelection;
2.
3. import javax.swing.*;
4. import java.awt.Color;
5. import java.awt.GridLayout;
6. import its.SimpleFrame.SimpleFrame;
7. import java.awt.event.*;
8.
9.
10.
11.
12. public class ColorSelectionFrame extends SimpleFrame {
13.
14.

private JPanel colPanel;

15.

private JButton redBut, blueBut, yellowBut;

16.
17.
18.

public ColorSelectionFrame() {

19.

blueBut = new JButton("blue");

20.

redBut = new JButton("red");

21.

yellowBut = new JButton("yellow");

22.
23.

ColorListener cList = new ColorListener();

24.

blueBut.addActionListener(cList);

25.

redBut.addActionListener(cList);

26.

yellowBut.addActionListener(cList);

27.
28. colPanel = new JPanel();

29. colPanel.setBackground(Color.gray);

30.
31.

GridLayout gLayout = new GridLayout(2,2);

32. this .getContentPane().setLayout(gLayout);

33.