Check1.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
JCheckBox demo with ActionListener.
*/
public class Check1 extends JFrame
{
public static void main(String[] argv)
{
Check1 t = new Check1();
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
t.show();
}
public Check1()
{
Toolkit kit = Toolkit.getDefaultToolkit();
Dimension ss = kit.getScreenSize();
setSize(ss.width/2,ss.height/6);
setLocation(ss.width/4,ss.height/4);
setTitle("CISC370-011 -- JCheckBox demo");
Container cp = getContentPane();
JPanel p = new JPanel();
cp.add(p);
JLabel label = new JLabel("Pick your favorite dwarfs:");
cp.add(label,BorderLayout.NORTH);
String[] labels = {
"Happy",
"Sleepy",
"Dopey",
"Grumpy",
"Sneezy",
"Doc",
"Bashful",
};
for (int i=0; i<labels.length; i++) {
JCheckBox box = new JCheckBox(labels[i]);
p.add(box);
box.setSelected(i%2 == 0);
box.addActionListener(new Checker(labels[i],box));
}
}
}
/**
An ActionListener to watch for changes in a JCheckBox.
*/
class Checker implements ActionListener
{
public Checker(String name,JCheckBox box)
{
this.name = name;
this.box = box;
}
public void actionPerformed(ActionEvent e)
{
System.out.println(name + " -> " + box.isSelected());
}
private String name;
private JCheckBox box;
}