Java DnDConstants ACTION_COPY

public static final int ACTION_COPY

import java.awt.BorderLayout;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragGestureRecognizer;
import java.awt.dnd.DragSource;
//from  w w  w.  j  a  va 2s . c om
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;

public class Main extends JFrame implements DragGestureListener {
  DragSource ds = new DragSource();
  String[] items = { "Java", "C", "C++", "Lisp", "Perl", "Python" };
  JList jl = new JList(items);
  public Main() {
    super("Gesture Test");
    setSize(200, 150);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    getContentPane().add(new JScrollPane(jl), BorderLayout.CENTER);
    DragGestureRecognizer dgr = ds.createDefaultDragGestureRecognizer(jl,
        DnDConstants.ACTION_COPY, this);
    setVisible(true);
  }

  public void dragGestureRecognized(DragGestureEvent dge) {
    System.out.println("Drag Gesture Recognized!");
  }

  public static void main(String args[]) {
    new Main();
  }
}