Java 获取组合键

如何使用Java获得键盘上的键组合，例如（Ctrl+somekey，Alt+somekey）

我使用

KeyEvent

listener，

MouseEvent

listener来监听键盘上的所有键。通过使用该侦听器，我可以捕获键盘上的所有键事件。但是，我无法捕捉（Ctrl+Alt+Del）等组合键

使用上述代码，使用任意字符 如果要检查是否按下Alt+C+E，请执行以下操作

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.swing.*;

public class Sample implements KeyListener {
  private JTextField lbl=new JLabel("Hello");
  private JPanel pnl=new JPanel(new BorderLayout());
  private JFrame frm=new JFrame ("Sample");
  int []arr;int i=0;

  public Sample() {
    pnl.add("North", lbl);
    frm.setContentPane(pnl);
    frm.pack();
    frm.setVisible(true);
    lbl.addKeyListener(this);
    arr= new int[3];

    public void keyPressed(KeyEvent key) {
       arr[i]=key.getKeyCode();
       i++;
       if((arr[0]==VK_ALT||arr[1]==VK_ALT||arr[2]==VK_ALT)&&   (arr[0]==VK_C||arr[1]==VK_C||arr[2]==VK_C)&&(arr[0]==VK_E||arr[1]==VK_E||arr[2]==VK_E)) {
        //Code you want
       }
     }

     public void keyReleased(KeyEvent evt) {
       arr[i]=null;
     }

     public void keyTyped(KeyEvent kvt) {
     }
 }

}

---

这些答案中有很多看起来很复杂，我只是想添加我的解决方案

我写了一个KeyBinder类：

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Hashtable;

public abstract class KeyBinder implements KeyListener
{
    private Hashtable<Integer, Boolean> keyMap;

    private int[] keyCodes;

    public KeyBinder(final int... keyCodes)
    {
        this.keyMap = new Hashtable<>();
        this.keyCodes = keyCodes;
    }

    @Override
    public void keyTyped(final KeyEvent e) { }

    @Override
    public void keyPressed(final KeyEvent e)
    {
        getKeyMap().put(e.getKeyCode(), true);

        if (getKeysDown())
        {
            onKeysDown();
        }
    }

    @Override
    public void keyReleased(final KeyEvent e)
    {
        getKeyMap().put(e.getKeyCode(), false);
    }

    private Hashtable<Integer, Boolean> getKeyMap()
    {
        return this.keyMap;
    }

    public boolean getKeysDown()
    {
        for (final int key : this.keyCodes)
        {
            if (getKeyMap().containsKey(key))
            {
                if (!getKeyMap().get(key))
                {
                    return false;
                }
            } else {
                return false;
            }
        }

        return true;
    }

    public abstract void onKeysDown();
}

简单：）

---

简单版本

也许这回答了你的一些问题？顺便说一句，windows上的特殊操作系统组合键（如Ctrl+Alt+Del）无法被用户应用程序捕获，因为操作系统会在应用程序有机会之前捕获它们。这就是为什么VNC客户机和此类程序通常有一个菜单选项来向主机发送Ctrl+Alt+Del。检查一下这个答案，你就知道答案了。我想要的是整个组合键的意思（Ctrl+所有键）（Alt+所有键）。对我来说，这样检查每一把钥匙是不合适的。@Juno你需要什么来捕获所有的钥匙？这里回答了您的问题。@vels4j是的，我想捕获所有关键事件和所有关键组合事件的图像。所以，我需要知道所有的键组合events@Juno那么你必须检查所有的箱子。@Juno你想知道什么？我真的不明白。

@Override
public void keyPressed(KeyEvent evt) {
         if (evt.getKeyCode()==KeyEvent.VK_CONTROL) { ctrl  = true; }
    else if (evt.getKeyCode()==KeyEvent.VK_SHIFT)   { shift = true; }
    else if (evt.getKeyCode()==KeyEvent.VK_ALT)     { alt   = true; }
    else {
        keyHit = KeyEvent.getKeyText( evt.getKeyCode() );
        System.out.println("Key Hit is "+keyHit);
    }

    processLocalKeyEvent(evt);
}

@Override
public void keyReleased(KeyEvent evt) {

    if (evt.isControlDown() && keyHit != "") ctrl  = true;
    if (evt.isAltDown()     && keyHit != "") alt   = true;
    if (evt.isShiftDown()   && keyHit != "") shift = true;

    if (ctrl)  sb.append("Ctrl");
    if (shift) sb.append("Shift");   
    if (alt)   sb.append("Alt"); 
    if (!ctrl && !shift && !alt) {
        sb.append(keyHit);
    } else {
        sb.append("_"+keyHit);
    }

    if (ctrl || shift || alt) {
        Thread thread = new Thread();
        try {
            thread.sleep(300);
            rfbProto.capture();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    } else if ((ctrl || shift || alt) && keyHit=="") {
        rfbProto.capture();
    } else if ((!ctrl || !shift || !alt) && keyHit!="") {
        rfbProto.capture();
    }

    ctrl  = false;
    shift = false;
    alt   = false;
    keyHit = "";
    sb = new StringBuffer();
    processLocalKeyEvent(evt);
}

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Hashtable;

public abstract class KeyBinder implements KeyListener
{
    private Hashtable<Integer, Boolean> keyMap;

    private int[] keyCodes;

    public KeyBinder(final int... keyCodes)
    {
        this.keyMap = new Hashtable<>();
        this.keyCodes = keyCodes;
    }

    @Override
    public void keyTyped(final KeyEvent e) { }

    @Override
    public void keyPressed(final KeyEvent e)
    {
        getKeyMap().put(e.getKeyCode(), true);

        if (getKeysDown())
        {
            onKeysDown();
        }
    }

    @Override
    public void keyReleased(final KeyEvent e)
    {
        getKeyMap().put(e.getKeyCode(), false);
    }

    private Hashtable<Integer, Boolean> getKeyMap()
    {
        return this.keyMap;
    }

    public boolean getKeysDown()
    {
        for (final int key : this.keyCodes)
        {
            if (getKeyMap().containsKey(key))
            {
                if (!getKeyMap().get(key))
                {
                    return false;
                }
            } else {
                return false;
            }
        }

        return true;
    }

    public abstract void onKeysDown();
}

final KeyBinder binder = new KeyBinder(KeyEvent.VK_ALT, KeyEvent.VK_A)
{
    @Override
    public void onKeysDown()
    {
        System.out.println("Alt+A");
    }
};

startButton.addKeyListener(binder);

 private void jTable1KeyReleased(java.awt.event.KeyEvent evt) {                                    
   System.out.println(evt.getKeyCode()); //showing code of released button

    if(evt.isControlDown() && evt.getKeyCode()==40) // 40 is code for arrow down
    {
      //if ctrl is pressed and arrow down is released  
        System.out.println("Released " + evt.getKeyCode());
    }