package ch4;

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class KeyEventTest extends JFrame
{
    JLabel j1=new JLabel("您输入的东西:");
    KeyEventTest()
    {
        
        Container main=getContentPane();
        main.setLayout(new GridLayout(2,1));
        
        main.add(j1);

        main.addKeyListener(new KeyAdapter()
        {
            public void keyTyped(KeyEvent e)
            {
                int i=e.getKeyCode();
                String s=e.getKeyModifiersText(1);
                j1.setText(s);
                if(e.getKeyChar()=='a')
                System.out.print(i);
            }    
        });
    }
    public static void main(String[] args)
    {
        JFrame f=new KeyEventTest();
        f.setBounds(100,100,300,250);
        f.setVisible(true);
    }
}