java键盘监听无法触发

Question

程序只有一个JFrame，应该不是焦点问题。

import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;

public class GameInterface extends JFrame implements KeyListener{
Tank tank=new Tank();
Bullet bullet=new Bullet();
TankController tc=new TankController();
public GameInterface() {
this.addKeyListener(this);
this.setFocusable(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);

setBounds(0,0,1500,1000);
setVisible(true);

}

public void paint(Graphics g){
while(true){
tank.clearTank(g);
tank.clearMyTank(g);
tc.tankDirection();
tank.draw(g);

tank.drawMyTank(g);
bullet.draw(g);
}

}

public static void main(String[] args){
new GameInterface().repaint();
}
@Override
public void keyPressed(KeyEvent e) {
System.out.println("r");

switch(e.getKeyCode()){
case KeyEvent.VK_RIGHT:
Tank.myTank.Dirction=Tank.RIGHT;
Tank.myTank.x+=20;
break;
case KeyEvent.VK_LEFT:
Tank.myTank.Dirction=Tank.LEFT;
Tank.myTank.x-=20;
break;
case KeyEvent.VK_UP:
Tank.myTank.Dirction=Tank.UP;
Tank.myTank.y-=20;
break;
case KeyEvent.VK_DOWN:
Tank.myTank.Dirction=Tank.DOWN;
Tank.myTank.y+=20;
break;}

}

@Override
public void keyReleased(KeyEvent e) {

}

@Override
public void keyTyped(KeyEvent e) {

}

}

Answer 1

我试了下你这个是可以接到键盘指令的，，不过你有几个类没有给发，，这个应该不影响，，

这个你测试的时候，要把窗口打开然后按上下左右键，要不然键盘作用的对象就不是你的窗口，，不知道说明白没，，有问题还可以继续交流