Making a Component Draggable : Drag Drop « Swing JFC « Java

Making a Component Draggable


import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceDragEvent;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceEvent;
import java.awt.dnd.DragSourceListener;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class Main {
  public static void main(String[] argv) throws Exception {

    JComponent com = new DraggableComponent();

    JFrame f = new JFrame();

    f.setSize(300, 300);

class DraggableComponent extends JComponent implements DragGestureListener, DragSourceListener {
  DragSource dragSource;

  public DraggableComponent() {
    dragSource = new DragSource();
    dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, this);

  public void dragGestureRecognized(DragGestureEvent evt) {
    Transferable t = new StringSelection("aString");
    dragSource.startDrag(evt, DragSource.DefaultCopyDrop, t, this);

  public void dragEnter(DragSourceDragEvent evt) {

  public void dragOver(DragSourceDragEvent evt) {


  public void dragExit(DragSourceEvent evt) {

  public void dropActionChanged(DragSourceDragEvent evt) {
    System.out.println("changes the drag action between copy or move");

  public void dragDropEnd(DragSourceDropEvent evt) {
    System.out.println("finishes or cancels the drag operation");


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