/** Creates new form. NewJFrame. */ public NewJFrame() { initComponents(); }
/** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form. Editor. */ // <editor-fold defaultstate="collapsed" desc=" 生成的代码 "> private void initComponents() { jScrollPane1 = new javax.swing.JScrollPane(); jTextArea1 = new MyTextArea(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jTextArea1.setColumns(20); jTextArea1.setRows(5); jScrollPane1.setViewportView(jTextArea1); getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER); pack(); }// </editor-fold>
/** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new NewJFrame().setVisible(true); } }); }
class MyTextArea extends JTextArea implements DropTargetListener{ public MyTextArea(){ new DropTarget(this, DnDConstants.ACTION_COPY_OR_MOVE, this); } public void dragEnter(DropTargetDragEvent dtde) { } public void dragOver(DropTargetDragEvent dtde) { } public void dropActionChanged(DropTargetDragEvent dtde) { } public void dragExit(DropTargetEvent dte) { } public void drop(DropTargetDropEvent dtde) { try { Transferable tr = dtde.getTransferable(); if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) { dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE); System.out.println("file cp"); List list = (List) (dtde.getTransferable() .getTransferData(DataFlavor.javaFileListFlavor)); Iterator iterator = list.iterator(); while (iterator.hasNext()) { File f = (File) iterator.next(); this.setText(f.getAbsolutePath()); } dtde.dropComplete(true); this.updateUI(); }else { dtde.rejectDrop(); } } catch (IOException ioe) { ioe.printStackTrace(); } catch (UnsupportedFlavorException ufe) { ufe.printStackTrace(); } }
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.swing.JTextArea;/**
*
* @author Administrator
*/
public class NewJFrame. extends javax.swing.JFrame. {
/** Creates new form. NewJFrame. */
public NewJFrame() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form. Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new MyTextArea(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1); getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER); pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
class MyTextArea extends JTextArea implements DropTargetListener{
public MyTextArea(){
new DropTarget(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
}
public void dragEnter(DropTargetDragEvent dtde) {
} public void dragOver(DropTargetDragEvent dtde) {
} public void dropActionChanged(DropTargetDragEvent dtde) {
} public void dragExit(DropTargetEvent dte) {
} public void drop(DropTargetDropEvent dtde) {
try {
Transferable tr = dtde.getTransferable(); if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
System.out.println("file cp");
List list = (List) (dtde.getTransferable()
.getTransferData(DataFlavor.javaFileListFlavor));
Iterator iterator = list.iterator();
while (iterator.hasNext()) {
File f = (File) iterator.next();
this.setText(f.getAbsolutePath());
}
dtde.dropComplete(true);
this.updateUI();
}else {
dtde.rejectDrop();
}
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (UnsupportedFlavorException ufe) {
ufe.printStackTrace();
}
}
}
// 变量声明 - 不进行修改
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
// 变量声明结束
}