JCheckBox复选框代码1

public class JCheckBoxTest extends JApplet{

public void init() {
Container contentPane = getContentPane();
contentPane.add(new PrintOptionsPanel(this), "Center");
}
}
class PrintOptionsPanel extends JPanel {
JCheckBox oddPages, evenPages, collate, lastFirst;
Listener listener = new Listener();
JApplet applet;


public PrintOptionsPanel(JApplet applet) {
this.applet = applet;
oddPages = new JCheckBox("Odd Pages");
evenPages = new JCheckBox("Even Pages");
collate = new JCheckBox("Collate");
lastFirst = new JCheckBox("Last Page First");

oddPages.addItemListener (listener);
evenPages.addItemListener(listener);
collate.addItemListener (listener);
lastFirst.addItemListener(listener);

add(oddPages); 
add(evenPages);
add(collate); 
add(lastFirst);
}
class Listener implements ItemListener {
public void itemStateChanged(ItemEvent event) {
applet.showStatus(
"Odd Pages: " + oddPages.isSelected() + ", " +
"Even Pages: " + evenPages.isSelected() + ", " +
"Collate: " + collate.isSelected() + ", " +
"Last Page First: " + lastFirst.isSelected());
}
}
}