Java KeyListener 的使用
Java KeyListener 的使用
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| //package java_key;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class KeyWork extends JFrame implements KeyListener
{
private JLabel status;
public KeyWork()
{
super("abcd");
status = new JLabel();
status.setFont(new Font("TimesRoman", Font.BOLD, 50));
getContentPane().add(status, BorderLayout.CENTER);
addKeyListener(this);
setSize(700,500);
show();
}
public void keyPressed(KeyEvent e) {
char ch = e.getKeyChar();
status.setText(String.valueOf(ch) + " " +(int)ch);
}
public void keyTyped(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
}
public class Main {
public static void main(String[] args) {
KeyWork app = new KeyWork();
app.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}
|
