package jni;

public class Example  implements KeyboardEventListener {

    static GlobalEventListener gl;

    public static void main(String[] args) throws Exception  
    {
        Example inst = new Example();
        gl = new GlobalEventListener();
          gl.addKeyboardEventListener(inst);
    }
            
    public void GlobalKeyPressed( KeyboardEvent event )
    {
        
        System.out.println( "Key Pressed: " + event.getVirtualKeyCode() );
    }

    public void GlobalKeyReleased( KeyboardEvent event )
    {
        System.out.println( "Key Released: " + event.getVirtualKeyCode() );
    }
    
}

package jni;

public class GlobalEventListener
{
    PoolHook pt;
    public GlobalEventListener()
    {
        pt = new PoolHook(this);
        pt.start();
            
    }
 
    protected javax.swing.event.EventListenerList listenerList = new javax.swing.event.EventListenerList();
     
    public void addKeyboardEventListener(KeyboardEventListener listener)
    {
        listenerList.add( KeyboardEventListener.class, listener );
    }
 
    public void removeKeyboardEventListener(KeyboardEventListener listener)
    {
        listenerList.remove( KeyboardEventListener.class, listener );
    }
    
    
    void keyPressed(KeyboardEvent event)
    {
        Object[] listeners = listenerList.getListenerList();
        for ( int i = 0; i < listeners.length; i += 2 )
        {
            if ( listeners[ i ] == KeyboardEventListener.class )
            {
                ( (KeyboardEventListener)listeners[i + 1] ).GlobalKeyPressed( event );
            }
        }
    }
 
    void keyReleased(KeyboardEvent event)
    {
        Object[] listeners = listenerList.getListenerList();
        for ( int i = 0; i < listeners.length; i += 2 )
        {
            if ( listeners[ i ] == KeyboardEventListener.class )
            {
                ( (KeyboardEventListener)listeners[i + 1] ).GlobalKeyReleased( event );
            }
        }
    }
    
    
}
 

package jni;

import java.util.*;
 
public interface KeyboardEventListener extends EventListener
{
    public void GlobalKeyPressed( KeyboardEvent event );
    public void GlobalKeyReleased( KeyboardEvent event );
}


class KeyboardEvent extends EventObject
{
    private static final long serialVersionUID = 2341653211621224652L;
    boolean ts, ap, ek;
    int vk;
 
    public KeyboardEvent( Object source, boolean ts, int vk, boolean ap, boolean ek )
    {
        super(source);
        this.ts = ts;
        this.vk = vk;
        this.ap = ap;
        this.ek = ek;
    }
 
    public boolean getTransitionState()
    {
        return ts;
    }
 
    public long getVirtualKeyCode()
    {
        return vk;
    }
 
    public boolean isAltPressed()
    {
        return ap;
    }
 
    public boolean isExtendedKey()
    {
        return ek;
    }
 
    public boolean equals( KeyboardEvent event )
    {
        if( event.getVirtualKeyCode() == vk )
        {
            if( event.isExtendedKey() == ek )
            {
                if( event.isAltPressed() == ap )
                {
                    return true;
                }
            }
        }
        return false;
    }
}