Java/JDK 6/Drag and Drop

Drag and drop between JList and JTextField

 
import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultListModel;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
public class DnDDemo3 {
  public static void main(String[] args) {
    JPanel north = new JPanel();
    north.add(new JLabel("Drag from here:"));
    JTextField field = new JTextField(10);
    field.setDragEnabled(true); 
    north.add(field);
    final DefaultListModel listModel = new DefaultListModel();
    listModel.addElement("first");
    listModel.addElement("second");
    final JList list = new JList(listModel);
    list.setDragEnabled(true);
    list.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        if (dl.getIndex() == -1) {
          return false;
        } else {
          return true;
        }
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        Transferable transferable = support.getTransferable();
        String data;
        try {
          data = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (Exception e) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        int index = dl.getIndex();
        if (dl.isInsert()) {
          listModel.add(index, data);
        } else {
          listModel.set(index, data);
        }
        Rectangle r = list.getCellBounds(index, index);
        list.scrollRectToVisible(r);
        return true;
      }
    });
    JScrollPane center = new JScrollPane();
    center.setViewportView(list);
    list.setDropMode(DropMode.USE_SELECTION);
    JPanel cp = new JPanel();
    cp.setLayout(new BorderLayout());
    cp.add(north, BorderLayout.NORTH);
    cp.add(center, BorderLayout.CENTER);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(cp);
    frame.pack();
    frame.setVisible(true);
  }
}

Drag and drop between JTextArea and JTextField

 
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class DnDBetweenJTextAreaAndJTextFieldDemo {
  public static void main(String[] args) {
    JFrame frame = new JFrame("Drag and Drop Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(new JPanel());
    JTextField textField = new JTextField(25);
    textField.setText("www.jexp.ru");
    frame.add(textField);
    JTextArea textArea = new JTextArea(4, 25);
    textArea.setText("Demonstrating\ndrag and drop");
    frame.getContentPane().add(new JScrollPane(textArea));
    textArea.setDragEnabled(true);
    textField.setDragEnabled(true);
    frame.pack();
    frame.setVisible(true);
  }
}

DropMode.INSERT

 

import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultListModel;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
public class DropModeINSERT {
  public static void main(String[] args) {
    JPanel north = new JPanel();
    north.add(new JLabel("Drag from here:"));
    JTextField field = new JTextField(10);
    field.setDragEnabled(true); 
    north.add(field);
    final DefaultListModel listModel = new DefaultListModel();
    listModel.addElement("first");
    listModel.addElement("second");
    final JList list = new JList(listModel);
    list.setDragEnabled(true);
    list.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        if (dl.getIndex() == -1) {
          return false;
        } else {
          return true;
        }
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        Transferable transferable = support.getTransferable();
        String data;
        try {
          data = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (Exception e) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        int index = dl.getIndex();
        if (dl.isInsert()) {
          listModel.add(index, data);
        } else {
          listModel.set(index, data);
        }
        // Scroll to display the element that was dropped
        Rectangle r = list.getCellBounds(index, index);
        list.scrollRectToVisible(r);
        return true;
      }
    });
    JScrollPane center = new JScrollPane();
    center.setViewportView(list);
    list.setDropMode(DropMode.INSERT);
    JPanel cp = new JPanel();
    cp.setLayout(new BorderLayout());
    cp.add(north, BorderLayout.NORTH);
    cp.add(center, BorderLayout.CENTER);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(cp);
    frame.pack();
    frame.setVisible(true);
  }
}

DropMode.ON

 
import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultListModel;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
public class DropModeON {
  public static void main(String[] args) {
    JPanel north = new JPanel();
    north.add(new JLabel("Drag from here:"));
    JTextField field = new JTextField(10);
    field.setDragEnabled(true); 
    north.add(field);
    final DefaultListModel listModel = new DefaultListModel();
    listModel.addElement("first");
    listModel.addElement("second");
    final JList list = new JList(listModel);
    list.setDragEnabled(true);
    list.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        if (dl.getIndex() == -1) {
          return false;
        } else {
          return true;
        }
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        Transferable transferable = support.getTransferable();
        String data;
        try {
          data = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (Exception e) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        int index = dl.getIndex();
        if (dl.isInsert()) {
          listModel.add(index, data);
        } else {
          listModel.set(index, data);
        }
        // Scroll to display the element that was dropped
        Rectangle r = list.getCellBounds(index, index);
        list.scrollRectToVisible(r);
        return true;
      }
    });
    JScrollPane center = new JScrollPane();
    center.setViewportView(list);
    list.setDropMode(DropMode.ON);
    JPanel cp = new JPanel();
    cp.setLayout(new BorderLayout());
    cp.add(north, BorderLayout.NORTH);
    cp.add(center, BorderLayout.CENTER);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(cp);
    frame.pack();
    frame.setVisible(true);
  }
}

DropMode.ON_OR_INSERT

 

import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultListModel;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
public class DropModeON_OR_INSERT {
  public static void main(String[] args) {
    JPanel north = new JPanel();
    north.add(new JLabel("Drag from here:"));
    JTextField field = new JTextField(10);
    field.setDragEnabled(true); 
    north.add(field);
    final DefaultListModel listModel = new DefaultListModel();
    listModel.addElement("first");
    listModel.addElement("second");
    final JList list = new JList(listModel);
    list.setDragEnabled(true);
    list.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        if (dl.getIndex() == -1) {
          return false;
        } else {
          return true;
        }
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        Transferable transferable = support.getTransferable();
        String data;
        try {
          data = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (Exception e) {
          return false;
        }
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        int index = dl.getIndex();
        if (dl.isInsert()) {
          listModel.add(index, data);
        } else {
          listModel.set(index, data);
        }
        // Scroll to display the element that was dropped
        Rectangle r = list.getCellBounds(index, index);
        list.scrollRectToVisible(r);
        return true;
      }
    });
    JScrollPane center = new JScrollPane();
    center.setViewportView(list);
    list.setDropMode(DropMode.ON_OR_INSERT);
    JPanel cp = new JPanel();
    cp.setLayout(new BorderLayout());
    cp.add(north, BorderLayout.NORTH);
    cp.add(center, BorderLayout.CENTER);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(cp);
    frame.pack();
    frame.setVisible(true);
  }
}

Set tree drag mode to DropMode.INSERT

 

import java.awt.BorderLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
public class DndTree {
  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel top = new JPanel(new BorderLayout());
    JLabel dragLabel = new JLabel("Drag me:");
    JTextField text = new JTextField();
    text.setDragEnabled(true);
    top.add(dragLabel, BorderLayout.WEST);
    top.add(text, BorderLayout.CENTER);
    f.add(top, BorderLayout.NORTH);
    final JTree tree = new JTree();
    final DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
    tree.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor) || !support.isDrop()) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        return dropLocation.getPath() != null;
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        TreePath path = dropLocation.getPath();
        Transferable transferable = support.getTransferable();
        String transferData;
        try {
          transferData = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (IOException e) {
          return false;
        } catch (UnsupportedFlavorException e) {
          return false;
        }
        int childIndex = dropLocation.getChildIndex();
        if (childIndex == -1) {
          childIndex = model.getChildCount(path.getLastPathComponent());
        }
        DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(transferData);
        DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) path.getLastPathComponent();
        model.insertNodeInto(newNode, parentNode, childIndex);
        TreePath newPath = path.pathByAddingChild(newNode);
        tree.makeVisible(newPath);
        tree.scrollRectToVisible(tree.getPathBounds(newPath));
        return true;
      }
    });
    JScrollPane pane = new JScrollPane(tree);
    f.add(pane, BorderLayout.CENTER);
    tree.setDropMode(DropMode.INSERT);
    f.setSize(300, 400);
    f.setVisible(true);
  }
}

Set tree drag mode to DropMode.ON

 

import java.awt.BorderLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
public class DndTree {
  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel top = new JPanel(new BorderLayout());
    JLabel dragLabel = new JLabel("Drag me:");
    JTextField text = new JTextField();
    text.setDragEnabled(true);
    top.add(dragLabel, BorderLayout.WEST);
    top.add(text, BorderLayout.CENTER);
    f.add(top, BorderLayout.NORTH);
    final JTree tree = new JTree();
    final DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
    tree.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor) || !support.isDrop()) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        return dropLocation.getPath() != null;
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        TreePath path = dropLocation.getPath();
        Transferable transferable = support.getTransferable();
        String transferData;
        try {
          transferData = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (IOException e) {
          return false;
        } catch (UnsupportedFlavorException e) {
          return false;
        }
        int childIndex = dropLocation.getChildIndex();
        if (childIndex == -1) {
          childIndex = model.getChildCount(path.getLastPathComponent());
        }
        DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(transferData);
        DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) path.getLastPathComponent();
        model.insertNodeInto(newNode, parentNode, childIndex);
        TreePath newPath = path.pathByAddingChild(newNode);
        tree.makeVisible(newPath);
        tree.scrollRectToVisible(tree.getPathBounds(newPath));
        return true;
      }
    });
    JScrollPane pane = new JScrollPane(tree);
    f.add(pane, BorderLayout.CENTER);
    tree.setDropMode(DropMode.ON);
    f.setSize(300, 400);
    f.setVisible(true);
  }
}

Set tree drag mode to DropMode.ON_OR_INSERT

 
import java.awt.BorderLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
public class DndTree {
  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel top = new JPanel(new BorderLayout());
    JLabel dragLabel = new JLabel("Drag me:");
    JTextField text = new JTextField();
    text.setDragEnabled(true);
    top.add(dragLabel, BorderLayout.WEST);
    top.add(text, BorderLayout.CENTER);
    f.add(top, BorderLayout.NORTH);
    final JTree tree = new JTree();
    final DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
    tree.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor) || !support.isDrop()) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        return dropLocation.getPath() != null;
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        TreePath path = dropLocation.getPath();
        Transferable transferable = support.getTransferable();
        String transferData;
        try {
          transferData = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (IOException e) {
          return false;
        } catch (UnsupportedFlavorException e) {
          return false;
        }
        int childIndex = dropLocation.getChildIndex();
        if (childIndex == -1) {
          childIndex = model.getChildCount(path.getLastPathComponent());
        }
        DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(transferData);
        DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) path.getLastPathComponent();
        model.insertNodeInto(newNode, parentNode, childIndex);
        TreePath newPath = path.pathByAddingChild(newNode);
        tree.makeVisible(newPath);
        tree.scrollRectToVisible(tree.getPathBounds(newPath));
        return true;
      }
    });
    JScrollPane pane = new JScrollPane(tree);
    f.add(pane, BorderLayout.CENTER);
    tree.setDropMode(DropMode.ON_OR_INSERT);
    f.setSize(300, 400);
    f.setVisible(true);
  }
}

Set tree DropMode to DropMode.USE_SELECTION

 
import java.awt.BorderLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.DropMode;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
public class DndTree {
  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel top = new JPanel(new BorderLayout());
    JLabel dragLabel = new JLabel("Drag me:");
    JTextField text = new JTextField();
    text.setDragEnabled(true);
    top.add(dragLabel, BorderLayout.WEST);
    top.add(text, BorderLayout.CENTER);
    f.add(top, BorderLayout.NORTH);
    final JTree tree = new JTree();
    final DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
    tree.setTransferHandler(new TransferHandler() {
      public boolean canImport(TransferHandler.TransferSupport support) {
        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor) || !support.isDrop()) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        return dropLocation.getPath() != null;
      }
      public boolean importData(TransferHandler.TransferSupport support) {
        if (!canImport(support)) {
          return false;
        }
        JTree.DropLocation dropLocation = (JTree.DropLocation) support.getDropLocation();
        TreePath path = dropLocation.getPath();
        Transferable transferable = support.getTransferable();
        String transferData;
        try {
          transferData = (String) transferable.getTransferData(DataFlavor.stringFlavor);
        } catch (IOException e) {
          return false;
        } catch (UnsupportedFlavorException e) {
          return false;
        }
        int childIndex = dropLocation.getChildIndex();
        if (childIndex == -1) {
          childIndex = model.getChildCount(path.getLastPathComponent());
        }
        DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(transferData);
        DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) path.getLastPathComponent();
        model.insertNodeInto(newNode, parentNode, childIndex);
        TreePath newPath = path.pathByAddingChild(newNode);
        tree.makeVisible(newPath);
        tree.scrollRectToVisible(tree.getPathBounds(newPath));
        return true;
      }
    });
    JScrollPane pane = new JScrollPane(tree);
    f.add(pane, BorderLayout.CENTER);
    tree.setDropMode(DropMode.USE_SELECTION);
    f.setSize(300, 400);
    f.setVisible(true);
  }
}

Transfer both Text and Color between JTextField and JTextArea

 
import java.awt.Color;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.TransferHandler;
import javax.swing.text.JTextComponent;
public class DnDDemo2 {
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setContentPane(new JPanel());
    JTextField textField = new JTextField(25);
    textField.setText("Let"s swing higher");
    frame.add(textField);
    JTextArea textArea = new JTextArea("Demonstrating\ndrag and drop");
    textArea.setForeground(Color.red);
    frame.add(new JScrollPane(textArea));
    textArea.setDragEnabled(true);
    textField.setDragEnabled(true);
    TextColorTransferHandler transferHandler = new TextColorTransferHandler();
    textArea.setTransferHandler(transferHandler);
    textField.setTransferHandler(transferHandler);
    frame.pack();
    frame.setVisible(true);
  }
}
class TextColorTransferHandler extends TransferHandler {
  public int getSourceActions(JComponent c) {
    return COPY_OR_MOVE;
  }
  protected Transferable createTransferable(JComponent component) {
    String text = ((JTextComponent) component).getText();
    Color color = component.getForeground();
    TextColor transferable = new TextColor(text, color);
    return transferable;
  }
  public boolean canImport(JComponent c, DataFlavor[] flavors) {
    return true;
  }
  public boolean importData(JComponent component, Transferable transferable) {
    String colorMimeType = DataFlavor.javaJVMLocalObjectMimeType + ";class=java.awt.Color";
    JTextComponent textComponent = (JTextComponent) component;
    try {
      DataFlavor colorFlavor = new DataFlavor(colorMimeType);
      Color color = (Color) transferable.getTransferData(colorFlavor);
      String text = (String) transferable.getTransferData(DataFlavor.stringFlavor);
      textComponent.setForeground(color);
      textComponent.setText(text);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return true;
  }
}
class TextColor implements Transferable {
  private String text;
  private Color color;
  private DataFlavor[] flavors;
  public TextColor(String text, Color color) {
    String colorMimeType = DataFlavor.javaJVMLocalObjectMimeType + ";class=java.awt.Color";
    DataFlavor colorFlavor = null;
    try {
      colorFlavor = new DataFlavor(colorMimeType);
    } catch (ClassNotFoundException e) {
    }
    flavors = new DataFlavor[2];
    flavors[0] = DataFlavor.stringFlavor;
    flavors[1] = colorFlavor;
    this.text = text;
    this.color = color;
  }
  public DataFlavor[] getTransferDataFlavors() {
    return (DataFlavor[]) flavors.clone();
  }
  public boolean isDataFlavorSupported(DataFlavor flavor) {
    for (int i = 0; i < flavors.length; i++) {
      if (flavor.equals(flavors[i])) {
        return true;
      }
    }
    return false;
  }
  public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
    if (flavor.equals(flavors[0])) {
      return text;
    } else if (flavor.equals(flavors[1])) {
      return color;
    } else {
      throw new UnsupportedFlavorException(flavor);
    }
  }
}
//Reference:
//Java 6 New Features: A Tutorial
//by Budi Kurniawan 
//Brainy Software Corp. 2006
//Chapter 4 - Networking
//# ISBN-10: 0975212885
//# ISBN-13: 978-0975212882