JComboBox 打印 ＡＳＣＩＩ码

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class JComboBoxDemo extends JFrame
{
private JComboBox jcb;
private String names[]={ "1 ", "2 ", "3 "};
public JComboBoxDemo()
{
super( "JComboBox Test ");
this.setLayout(new FlowLayout());

jcb=new JComboBox(names);
jcb.setMaximumRowCount(3);

jcb.addKeyListener(new KeyListener()
{
public void keyPressed(KeyEvent event){
int keyCode = event.getKeyCode();
System.out.println( "+++++++++++++++++++keyCode++++++++++++++++++++ ");
System.out.println( "+++++++++++++++ "+keyCode+ "++++++++++++++++++ ");
if(keyCode == KeyEvent.VK_ENTER){
System.out.println( "+++++++++++++++++++enter!!!++++++++++++++++++++ ");
}
}
public void keyReleased(KeyEvent event){
}
public void keyTyped(KeyEvent event) {
}
});

this.add(jcb);
setSize(350,200);
setVisible(true);
}
public static void main(String args[])
{
JComboBoxDemo app=new JComboBoxDemo();
app.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
}