swing 全局热键

package com.easyfeeling.utils.hotkey;

import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.Toolkit;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class HotkeyTest {

 
 public static void main(String[] args) {
  JFrame frame = new JFrame();

  JButton button = new JButton("Button");
  JTextArea textArea = new JTextArea();
  JScrollPane scroller = new JScrollPane(textArea);
  frame.getContentPane().add(button, BorderLayout.NORTH);
  frame.getContentPane().add(scroller, BorderLayout.CENTER);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setSize(500, 500);
  frame.setVisible(true);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setSize(500, 500);
  frame.setVisible(true);
  
  Toolkit toolkit = Toolkit.getDefaultToolkit();
  // 注册应用程序全局键盘事件, 所有的键盘事件都会被此事件监听器处理.
  toolkit.addAWTEventListener(
    new java.awt.event.AWTEventListener() {
     public void eventDispatched(AWTEvent event) {
      if (event.getClass() == KeyEvent.class) {
       KeyEvent kE = ((KeyEvent) event);
       System.out.println(kE.getKeyCode()+"    "+kE.getKeyChar());
       // 处理按键事件 Ctrl+Enter
       if ((kE.getKeyCode() == KeyEvent.VK_ENTER)
         && (((InputEvent) event)
           .isControlDown())) {

        //window.refreshAction();
       } /* page down */else if (kE.getKeyCode() == KeyEvent.VK_PAGE_DOWN
         && kE.getID() == KeyEvent.KEY_PRESSED) {
        //window.nextPageAction();
         System.out.println("page down:" + kE.getID());

       } /* page up */else if (kE.getKeyCode() == KeyEvent.VK_PAGE_UP
         && kE.getID() == KeyEvent.KEY_PRESSED) {
        //window.previousPageAction();
        System.out.println("page down:" + kE.getID());

       }/* Ctrl +K */else if (kE.getKeyCode() == KeyEvent.VK_K
         && kE.isControlDown()
         && kE.getID() == KeyEvent.KEY_PRESSED) {
        System.out.println("Ctrl +K");
        //window.getSearchTF().requestFocus();
       }
       /* home */else if (kE.getKeyCode() == KeyEvent.VK_HOME
         && kE.getID() == KeyEvent.KEY_PRESSED) {
        System.out.println("home");
        //window.firstPageAction();
       }
       /* end */else if (kE.getKeyCode() == KeyEvent.VK_END
         && kE.getID() == KeyEvent.KEY_PRESSED) {
        System.out.println("end");
        //window.lastPageAction();
       }
      }
     }
    }, java.awt.AWTEvent.KEY_EVENT_MASK);
 }
 
}