关于键盘事件的处理

[dxb_828]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ButtonDemo extends JFrame implements ActionListener,KeyListener
{
JTextField text;
JButton button;
public ButtonDemo()
{
JPanel panel=new JPanel();
this.getContentPane().add(panel);
text=new JTextField("0.");
text.setEditable(false);
button=new JButton("按钮");
button.addKeyListener(new KeyAdapter()
{
public void keyPressed(KeyEvent e)
{
int keyCode=e.getKeyCode();
if(keyCode==KeyEvent.VK_1)
{
text.setText("1");
}
}
}
);
button.addActionListener(this);
panel.add(text);
panel.add(button);
this.pack();
this.setVisible(true);
this.addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent e)
{
text.setText("1");
}

public static void main(String args[])
{
new ButtonDemo();
}
}
想实现按键盘‘1’键，打印1，需要怎么修改？

[yuzl32]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ButtonDemo extends JFrame implements ActionListener//,KeyListener
{
JTextField text;
JButton button;
public ButtonDemo()
{
JPanel panel=new JPanel();
this.getContentPane().add(panel);
text=new JTextField("0.");
text.setEditable(false);
button=new JButton("按钮");
//button.
button.addKeyListener(new KeyAdapter()
{
public void keyPressed(KeyEvent e)
{
int keyCode=e.getKeyCode();
System.out.println("keyCode:" + keyCode + " VK_NUMPAD1:" + KeyEvent.VK_NUMPAD1 );
if(keyCode==KeyEvent.VK_NUMPAD1) // 这是数字键
{
text.setText("1");
}
}
}
);
button.addActionListener(this);
panel.add(text);
panel.add(button);
this.pack();
this.setVisible(true);
this.addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
button.requestFocus();
}
public void actionPerformed(ActionEvent e)
{
text.setText("1");
}

public static void main(String args[])
{
new ButtonDemo();
}
}