检测ctrl键是否被按下 

 1 package jsystem.infra.util;
 2 
 3 import java.awt.KeyEventDispatcher;
 4 import java.awt.KeyboardFocusManager;
 5 import java.awt.event.KeyEvent;
 6 
 7 /** 
 8  * Class <code>CtrlListener</code> is used to detect whether the ctrl is pressed
 9  * @author etxyzbh
10  * @version 14/12/2012
11  *
12  */
13 public class CtrlListener {
14     private static boolean isCtrlDown;
15 
16     static {
17         KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(
18             new KeyEventDispatcher() {
19                 public boolean dispatchKeyEvent(KeyEvent e) {
20                     isCtrlDown = e.isControlDown();
21                     return false;
22                 }
23             });
24     }
25 
26 /**
27  * 
28  * @return the current status whether the ctrl is pressed 
29  */
30     public static boolean isCtrlDown() {
31         return isCtrlDown;
32     }
33     
34 }

 

posted @ 2013-01-04 09:35  <逍遥人生>  阅读(976)  评论(0)    收藏  举报