java 箭头键代码
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Codes for Arrow Keys
提问by Rohan
In a java program I've added keylistener and I want to check if anyone has pressed the arrow keys or not.Can anyone please help me since I dont know any ascii codes for arrow keys? If possible please give a sample program also.
在 Java 程序中，我添加了 keylistener，我想检查是否有人按下了箭头键。有人可以帮助我，因为我不知道箭头键的任何 ascii 代码吗？如果可能，还请提供示例程序。
回答by Breavyn
KeyEvent.VK_UPKeyEvent.VK_DOWNKeyEvent.VK_LEFTKeyEvent.VK_RIGHT
KeyEvent.VK_UPKeyEvent.VK_DOWNKeyEvent.VK_LEFTKeyEvent.VK_RIGHT
These are the conditions that you test e.getKeyCode()for.
这些是您测试的条件e.getKeyCode()。
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
switch( key ) {
case KeyEvent.VK_UP:
// up
break;
case KeyEvent.VK_DOWN:
// down
break;
case KeyEvent.VK_LEFT:
// left
break;
case KeyEvent.VK_RIGHT :
// right
break;
}
}
EDIT: I just see now a duplicate of this question here How to check if the key pressed was an arrow key in Java KeyListener?
编辑：我现在刚刚在这里看到这个问题的副本如何检查按下的键是否是 Java KeyListener 中的箭头键？
