java里的keyPressed键盘监听器没作用

更新时间2019-09-21 04:50:41

import java.awt.*;

import java.awt.event.*;

 

public class KeyEvent {

public static void main(String[] args) {

new KeyFrame().launchFrame();

}

}

 

class KeyFrame extends Frame {

public void launchFrame() {

setBounds(300,300,400,300);

addKeyListener(new KeyMonitor());

setVisible(true);

}

 

class KeyMonitor extends KeyAdapter {

public void keyPressed(KeyEvent e) {

System.out.println("ok");

}

}

}

相关标签:java