Question

java 实现键盘控制矩形持续移动

public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
switch(e.getKeyCode()){
case KeyEvent.VK_UP:y-=10;break;
case KeyEvent.VK_DOWN:y+=10;break;
case KeyEvent.VK_LEFT:x-=10;break;
case KeyEvent.VK_RIGHT:x+=10;break;
}
this.repaint();
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub

}

public void move(){

}
@Override
public void run() {
// TODO Auto-generated method stub
}

}

重写的RUN方法怎么写啊

Answer 1

楼主是要按键实现移动就写个循环嘛。。在按下某个键的时候就开启一个线程。循环执行移动操作。。y-=10;不过首先要判断当前线程是否正在执行移动操作，
如果是则结束线程。

追问

Exception in thread "AWT-EventQueue-0" java.lang.IllegalThreadStateException
at java.lang.Thread.start(Thread.java:595)
at keymoverect.MoveRectPanel.keyPressed(MoveRectPanel.java:57)

报错。。。第57行代码：case KeyEvent.VK_UP:tup.start();break;