Question

java 键盘监听 按一次键监听到两次

public gameWin()//构造方法
{
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 18; j++) {
map[i][j] = 0;
}
}
for (int i = 0; i < fangkuai.length; i++) {
fangkuai[i] = new gamefangkuai();
}
setLayout(new FlowLayout(FlowLayout.RIGHT));
this.add(newgame);
this.add(endgame);
newgame.addActionListener(this);
endgame.addActionListener(this);
addKeyListener(this);

}
public void keyPressed(KeyEvent e) //键盘监听部分代码
{
// TODO Auto-generated method stub
if (start){
switch (e.getKeyCode()) {
case KeyEvent.VK_DOWN:
down();
break;
case KeyEvent.VK_UP:
//move(0,1);
break;
case KeyEvent.VK_LEFT:
System.out.println("anjian1ci");//发现按一次键 打印2次 键盘没坏
move(-1,0);
break;
case KeyEvent.VK_RIGHT:
move(1,0);
break;

default:
break;
}
}
}

Answer 1

可能有2个响应吧 按下 、弹起， 所以触发了2次