I just commented out some things, and when you are trying to use listeners you need to implement them first.
Why is ItemListener in there?
anyways, here you'll see what I commented out, compile it and run it.
CODE
/*
Chapter 6: Buttons
Programmer: Justin Mosley
Date: September 14, 2007
Filename: Buttons.java
Purpose:
*/
import java.awt.*;
import java.awt.event.*;
public class Buttons extends Frame implements ActionListener// ItemEventListener
{
public Buttons()
{
//set the layout
setLayout(new BorderLayout(20,5));
//Add buttons
Button Red = new Button("Red");
Button Yellow = new Button("Yellow");
Button Cyan = new Button("Cyan");
Button Magenta = new Button("Magenta");
Choice colors = new Choice();
//Button White = new Button("White");
add(Red, BorderLayout.NORTH);
add(Yellow, BorderLayout.SOUTH);
add(Cyan, BorderLayout.EAST);
add(Magenta, BorderLayout.WEST);
add(colors, BorderLayout.CENTER);
//choice component colors
colors.add("Red");
colors.add("Yellow");
colors.add("Cyan");
colors.add("Magenta");
//ItemLister for choice component
Red.addActionListener(this);
Yellow.addActionListener(this);
Cyan.addActionListener(this);
Magenta.addActionListener(this);
// colors.addActionListener(this);
//add the ActionListener to each menu item
Red.addActionListener(this);
Yellow.addActionListener(this);
Cyan.addActionListener(this);
Magenta.addActionListener(this);
//White.addActionListener(this);
//override the windowClosing event
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
//This method is triggered by the user clicking in the choice component area in the center and choicing a color
/* public void itemStateChanged(ItemEvent ie)
{
//String arg = ie.getActionCommand();
if (ie.getSource().equals(Red))
setBackground(Color.red);
if (arg == "Yellow")
setBackground(Color.yellow);
if (arg == "Cyan")
setBackground(Color.cyan);
if (arg == "Magenta")
setBackground(Color.magenta);
if (arg == "White")
setBackground(Color.white);
}*/
public static void main(String[] args)
{
// set frame properties
Buttons f = new Buttons();
f.setTitle("Border Application");
f.setBounds(200,200,300,300);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
//test for button clicks
String arg = e.getActionCommand();
if (arg=="Red")
setBackground(Color.red);
if (arg == "Yellow")
setBackground(Color.yellow);
if (arg == "Cyan")
setBackground(Color.cyan);
if (arg == "Magenta")
setBackground(Color.magenta);
if (arg == "White")
setBackground(Color.white);
}
}
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