JavaExercises/Experiments/DragAndDrop.java at master · biblelamp/JavaExercises · GitHub

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/**

* Simple drag and drop file example

* from

* http://java-demos.blogspot.ru/2013/06/drag-and-drop-file-in-jtextarea.html

* with small changes

import java.awt.dnd.*;

import java.awt.*;

import javax.swing.*;

import java.awt.datatransfer.*;

import java.io.*;

class DragAndDrop extends JFrame {

private JTextArea jt;

public DragAndDrop() {

createAndShowGUI();

}

private void createAndShowGUI() {

setTitle("Drag and Drop Example");

setDefaultCloseOperation(EXIT_ON_CLOSE);

setSize(400, 400);

setLocationRelativeTo(null); // to the center of the screen

setLayout(new BorderLayout());

// Create JTextArea

jt = new JTextArea();

JScrollPane sb = new JScrollPane(jt);

add(sb);

enableDragAndDrop();

setVisible(true);

}

private void enableDragAndDrop() {

DropTarget target = new DropTarget(jt, new DropTargetListener() {

public void dragEnter(DropTargetDragEvent e) {

}

public void dragExit(DropTargetEvent e) {

}

public void dragOver(DropTargetDragEvent e) {

}

public void dropActionChanged(DropTargetDragEvent e) {

}

public void drop(DropTargetDropEvent e) {

try {

// Accept the drop first, important!

e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);

// Get the files that are dropped as java.util.List

java.util.List list = (java.util.List) e.getTransferable(). getTransferData(DataFlavor.javaFileListFlavor);

// Now get the first file from the list,

File file = (File) list.get(0);

jt.read(new FileReader(file), null);

} catch (Exception ex) {}

}

});

}

static public void main(String args[]) {

new DragAndDrop();

}

JavaExercises/Experiments/DragAndDrop.java at master · biblelamp/JavaExercises · GitHub

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