import java.awt.*;
import java.awt.event.*;public class TestKey {
public static void main(String[]args){
MyFrame mf=new MyFrame();
mf.launchFrame();
}
}class MyFrame extends Frame{
public void launchFrame(){
setBounds(300,300,300,500);
setVisible(true);
this.addKeyListener(new Monitor());
}
private class Monitor extends KeyAdapter{
public void keyPressed(KeyEvent e){
int keycode=e.getKeyCode();
if(keycode==KeyEvent.VK_0 ){
System.out.println("nihao");
}
}
}
}不知道哪里出错了
import java.awt.event.*;public class TestKey {
public static void main(String[]args){
MyFrame mf=new MyFrame();
mf.launchFrame();
}
}class MyFrame extends Frame{
public void launchFrame(){
setBounds(300,300,300,500);
setVisible(true);
this.addKeyListener(new Monitor());
}
private class Monitor extends KeyAdapter{
public void keyPressed(KeyEvent e){
int keycode=e.getKeyCode();
if(keycode==KeyEvent.VK_0 ){
System.out.println("nihao");
}
}
}
}不知道哪里出错了
at TestKey.main(TestKey.java:6)
以上就是我的错误
修改后class MyFrame extends JFrame{
public void launchFrame(){
setBounds(300,300,300,500);
setVisible(true);
this.addKeyListener(new Monitor());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
thank you in advance for giving me credits.
import javax.swing.JFrame;public class TestKey {
public static void main(String[]args){
MyFrame mf=new MyFrame();
mf.launchFrame();
}
}class MyFrame extends JFrame{
public void launchFrame(){
setBounds(300,300,300,500);
setVisible(true);
this.addKeyListener(new Monitor());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private class Monitor extends KeyAdapter{
public void keyPressed(KeyEvent e){
int keycode=e.getKeyCode();
if(keycode==KeyEvent.VK_0 ){
System.out.println("nihao");
}
}
}
}
还是不行,我也没理解,能不能再通俗点