import java.awt.Container; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.util.ArrayList; 
import java.util.List; 
 
import javax.swing.JFrame; 
import javax.swing.JTextArea; 
 
public abstract class MultiKeyListener implements KeyListener { 
 
    private List<Integer> codeList = new ArrayList<Integer>(); 
     
    @Override 
    public final void keyTyped(KeyEvent e) { 
    } 
 
    @Override 
    public final void keyPressed(KeyEvent e) { 
        int keyCode = e.getKeyCode(); 
        if(!codeList.contains(keyCode)) { 
            codeList.add(keyCode); 
        } 
        this.onPressed(codeList, e); 
    } 
 
    @Override 
    public final void keyReleased(KeyEvent e) { 
        for(int i = 0, n = codeList.size() ; i < n ; i++) { 
            if(e.getKeyCode() == codeList.get(i)) { 
                codeList.remove(i); 
                break; 
            } 
        } 
    } 
     
    protected abstract void onPressed(List<Integer> codeList, KeyEvent event); 
     
    public static void main(String[] args) { 
        final JFrame frame = new JFrame() {}; 
        Container c = frame.getContentPane(); 
        JTextArea area = new JTextArea(); 
        c.add(area); 
        area.addKeyListener(new MultiKeyListener() { 
             
            private List<Integer> closeQuick = new ArrayList<Integer>(); 
             
            { 
                closeQuick.add(KeyEvent.VK_ALT); 
                closeQuick.add(KeyEvent.VK_A); 
                closeQuick.add(KeyEvent.VK_B); 
            } 
             
            @Override 
            protected void onPressed(List<Integer> codeList, KeyEvent event) { 
                //实现alt+a+b输出“关闭程序” 
                if(codeList.equals(closeQuick)) { 
                    System.out.println("程序关闭......"); 
                } 
            } 
        }); 
        frame.setVisible(true); 
    } 
} 
import java.awt.Container;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JFrame;
import javax.swing.JTextArea;

public abstract class MultiKeyListener implements KeyListener {

 private List<Integer> codeList = new ArrayList<Integer>();
 
 @Override
 public final void keyTyped(KeyEvent e) {
 }

 @Override
 public final void keyPressed(KeyEvent e) {
  int keyCode = e.getKeyCode();
  if(!codeList.contains(keyCode)) {
   codeList.add(keyCode);
  }
  this.onPressed(codeList, e);
 }

 @Override
 public final void keyReleased(KeyEvent e) {
  for(int i = 0, n = codeList.size() ; i < n ; i++) {
   if(e.getKeyCode() == codeList.get(i)) {
    codeList.remove(i);
    break;
   }
  }
 }
 
 protected abstract void onPressed(List<Integer> codeList, KeyEvent event);
 
 public static void main(String[] args) {
  final JFrame frame = new JFrame() {};
  Container c = frame.getContentPane();
  JTextArea area = new JTextArea();
  c.add(area);
  area.addKeyListener(new MultiKeyListener() {
   
   private List<Integer> closeQuick = new ArrayList<Integer>();
   
   {
    closeQuick.add(KeyEvent.VK_ALT);
    closeQuick.add(KeyEvent.VK_A);
    closeQuick.add(KeyEvent.VK_B);
   }
   
   @Override
   protected void onPressed(List<Integer> codeList, KeyEvent event) {
    //实现alt+a+b输出“关闭程序”
    if(codeList.equals(closeQuick)) {
     System.out.println("程序关闭......");
    }
   }
  });
  frame.setVisible(true);
 }
}
说明：支持多种复合键，可以自行添加按键组合，还有KeyEvent没有KeyEvent.VK_CTRL字段，如要添加ctrl，可以获取ctrl的 keycode，然后直接添加到list里面去。 ctrl的keycode是17.