what's wrong with my component?

[dxuranus]

i make a new component which is a dragable icon here is my piece of
code

//class: DragAbleComponent.the father of my component

import java.awt.Graphics;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.accessibility.Accessible;
import javax.swing.JComponent;

public abstract class DragAbleComponent extends JComponent implements
MouseListener,
FocusListener, Accessible ,MouseMotionListener{
private int X;

private int Y;


/**
*
*/
private static final long serialVersionUID = 1L;



public void mouseClicked(MouseEvent e) {
this.requestFocusInWindow();

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

public void focusGained(FocusEvent e) {
this.repaint();}

public void focusLost(FocusEvent e) {
this.repaint();}

protected abstract void paintComponent(Graphics graphics);

public int getX() {
return X;
}

public void setX(int x) {
X = x;
}

public int getY() {
return Y;
}

public void setY(int y) {
Y = y;
}
}

//classragableIcon the component

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;

import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.KeyStroke;
import javax.swing.TransferHandler;

public class DragableIcon extends DragAbleComponent {

private Image image;

private MouseEvent firstMouseEvent = null;

private static boolean installKeyBordMapings = true;
/**
*
*/
private static final long serialVersionUID = 1L;

public DragableIcon(Image image) {
super();
this.image = image;
this.setFocusable(true);
this.addMouseListener(this);
this.addFocusListener(this);
this.addMouseMotionListener(this);
this.initKeyBordMaping();

}

private void initKeyBordMaping(){
if (installKeyBordMapings) {
InputMap imap = this.getInputMap();
// imap.put(KeyStroke.getKeyStroke("ctrl X"),
//
TransferHandler.getCutAction().getValue(Action.NAME));
imap.put(KeyStroke.getKeyStroke("ctrl C"),

TransferHandler.getCopyAction().getValue(Action.NAME));
imap.put(KeyStroke.getKeyStroke("ctrl V"),

TransferHandler.getPasteAction().getValue(Action.NAME));
}

ActionMap map = this.getActionMap();
//
map.put(TransferHandler.getCutAction().getValue(Action.NAME),
// TransferHandler.getCutAction());
map.put(TransferHandler.getCopyAction().getValue(Action.NAME),
TransferHandler.getCopyAction());

map.put(TransferHandler.getPasteAction().getValue(Action.NAME),
TransferHandler.getPasteAction());
}
@Override
protected void paintComponent(Graphics graphics) {
Graphics g = graphics.create();

//Draw in our entire space, even if isOpaque is false.
g.setColor(Color.WHITE);
g.fillRect(0, 0, image == null ? 125 : image.getWidth(this),
image == null ? 125 : image.getHeight(this));

if (image != null) {
//Draw image at its natural size of 125x125.
g.drawImage(image, 0, 0, this);
}

//Add a border, red if picture currently has focus
if (isFocusOwner()) {
g.setColor(Color.RED);
} else {
g.setColor(Color.BLACK);
}
g.drawRect(0, 0, image == null ? 125 : image.getWidth(this),
image == null ? 125 : image.getHeight(this));
// g.drawImage(image, 0, 0, this);
g.dispose();

}

public void mouseDragged(MouseEvent e) {

//Don't bother to drag if the component displays no image.
if (image == null) return;

if (firstMouseEvent != null) {
e.consume();

//If they are holding down the control key, COPY rather
than MOVE
int ctrlMask = InputEvent.CTRL_DOWN_MASK;
int action = ((e.getModifiersEx() & ctrlMask) == ctrlMask)
?
TransferHandler.COPY : TransferHandler.MOVE;

int dx = Math.abs(e.getX() - firstMouseEvent.getX());
int dy = Math.abs(e.getY() - firstMouseEvent.getY());
//Arbitrarily define a 5-pixel shift as the
//official beginning of a drag.
if (dx > 5 || dy > 5) {
//This is a drag, not a click.
JComponent c = (JComponent)e.getSource();
TransferHandler handler = c.getTransferHandler();
//Tell the transfer handler to initiate the drag.
handler.exportAsDrag(c, firstMouseEvent, action);
firstMouseEvent = null;
}
}

}

public void mouseMoved(MouseEvent e) {}


public void mousePressed(MouseEvent e) {
//Don't bother to drag if there is no image.
if (image == null) return;

firstMouseEvent = e;
e.consume();
}

public void mouseReleased(MouseEvent e) {
firstMouseEvent = null;
}

public static boolean isInstallKeyBordMapings() {
return installKeyBordMapings;
}

public static void setInstallKeyBordMapings(boolean
installKeyBordMapings) {
DragableIcon.installKeyBordMapings = installKeyBordMapings;
}

public Image getImage() {
return image;
}

public void setImage(Image image) {
this.image = image;
}
}

//and here is my pane

import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JToolBar;

import cn.com.ynld.bms.applet.gui.handler.IconTransferHandler;
import cn.com.ynld.bms.applet.service.TransfAble;
import cn.com.ynld.bms.applet.service.UpdateAble;

public class ElectronicPane extends JPanel
implements ItemListener,UpdateAble{
private UpdateAble updateAble = null;

private ScrollAbleImage image;
private JToolBar toolBar;
private IconTransferHandler handler;
/**
*
*/
private static final long serialVersionUID = 1L;




public ElectronicPane(){

super(new BorderLayout());
handler = new IconTransferHandler();
this.creatToolBar();
this.add(this.toolBar);
this.setTransferHandler(handler);

}

public void itemStateChanged(ItemEvent e) {}



public void addTransferAble(String key, TransfAble transferAble) {
// TODO

}

public TransfAble getTransferAble(String key) {
// TODO
return null;
}

public void removeTransferAble(String key) {
this.updateAble.removeTransferAble(key);

}

public void update(UpdateAble updateAble) {
this.updateAble = updateAble;
this.init();

}

private void init(){
this.image = new ScrollAbleImage();
this.image.update(updateAble);
this.add(image,BorderLayout.CENTER);
this.repaint();
//this.image.repaint();
}

private void creatToolBar(){


this.toolBar = new JToolBar();

DragableIcon alarm = new
DragableIcon(createImageIcon("/root/Desktop/drawing/png-0003.png",
"alarm").getImage());
alarm.setTransferHandler(handler);

DragableIcon damage = new
DragableIcon(createImageIcon("/root/Desktop/drawing/png-0007.png",
"device").getImage());
alarm.setTransferHandler(handler);
this.toolBar.add(alarm);
this.toolBar.addSeparator();
this.toolBar.add(damage);
this.toolBar.setFloatable(false);

}

/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path,
String description) {
// java.net.URL imageURL =
DragPictureDemo.class.getResource(path);

if (path == null) {
System.err.println("Resource not found: "
+ path);
return null;
} else {
return new ImageIcon(path, description);
}
}


}

the problem is i add DragableIcons to my toolbar but only the first
icon can be seen!!!!
what's wrong
thanks for any help!