我正在製作一個java 2d側滾動器,並且在同一時間有多個鍵出現問題。如右+上。無論何時釋放起來,即使右側仍然被按下,當你慢慢地回到地面時,也會停止向右移動。這裏是我設置的鍵盤監聽器。 dx是我的水平移動速度,dy是垂直高度。下面是從字符類釋放密鑰時遊戲滯後
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if (key == KeyEvent.VK_LEFT) {
dx = -5;
mainCharacterImageFacing = l.getImage();
}
if (key == KeyEvent.VK_RIGHT) {
dx = 5;
mainCharacterImageFacing = r.getImage();
}
if (key == KeyEvent.VK_UP) {
dy = 1;
mainCharacterImageFacing = r.getImage();
}
}
public void keyReleased(KeyEvent e) {
int key = e.getKeyCode();
if (key == KeyEvent.VK_LEFT);
dx = 0;
if (key == KeyEvent.VK_RIGHT)
dx = 0;
if (key == KeyEvent.VK_UP)
{dy = 0;
mainCharacterImageFacing = r.getImage();
}
這是從與調用按鍵/釋放方法以及處理與跳躍都將遊戲主窗口中的一些代碼。
private class AL extends KeyAdapter{
public void keyReleased(KeyEvent e) {
p.keyReleased(e);
}
public void keyPressed(KeyEvent e) {
p.keyPressed(e);
}
}
@Override
public void run()
{
long beforeTime;
long timeDiff;
long sleep;
beforeTime = System.currentTimeMillis();
while(done == false)
{
cycle();
timeDiff = System.currentTimeMillis() - beforeTime;
sleep = 10 - timeDiff;
if (sleep < 0)
sleep = 2;
try {
Thread.sleep(sleep);
} catch (Exception e)
{}
beforeTime = System.currentTimeMillis();
}
done = false;
h = false;
k = false;
}
boolean h = false;
boolean done = false;
public void cycle() {
if (h == false)
v = v - 2; //jump speed falling
if (v == 350) //max y value of jump. Lower numbers = higher jumps
h = true;
if (h == true && v <= 470) //starting y value
{
v = v + 2; //jump speed rising
if (v == 470)
done = true;
}
}