import java.awt.FlowLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.TransferHandler;
class DragMouseAdapter extends MouseAdapter {
public void mousePressed(MouseEvent e) {
JComponent c = (JComponent) e.getSource();
TransferHandler handler = c.getTransferHandler();
handler.exportAsDrag(c, e, TransferHandler.COPY);
}
}
public class IconDnD {
public static void main(String[] args) {
JFrame f = new JFrame("Icon Drag & Drop");
ImageIcon icon1 = new ImageIcon("a.png");
ImageIcon icon2 = new ImageIcon("b.png");
ImageIcon icon3 = new ImageIcon("c.png");
JButton button = new JButton(icon2);
JLabel label1 = new JLabel(icon1, JLabel.CENTER);
JLabel label2 = new JLabel(icon3, JLabel.CENTER);
MouseListener listener = new DragMouseAdapter();
label1.addMouseListener(listener);
label2.addMouseListener(listener);
label1.setTransferHandler(new TransferHandler("icon"));
button.setTransferHandler(new TransferHandler("icon"));
label2.setTransferHandler(new TransferHandler("icon"));
f.setLayout(new FlowLayout());
f.add(label1);
f.add(button);
f.add(label2);
f.pack();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}