A Simple Example of Copy and Paste

// This example is based on one from 
// the book _Java AWT Reference_ by John Zukowski.
// You may study, use, modify, and distribute this example for any purpose.

import java.io.*;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.*;


public class ClipMe extends Frame 
 implements ActionListener {

  TextField tf;
  TextArea ta;

  public static void main (String args[]) {
    new ClipMe().show();
  }

  public ClipMe() {

    super("Clipping Example");
    add(tf = new TextField("Welcome"), "North");
    add(ta = new TextArea(), "Center");
    MenuBar mb = new MenuBar();
    mb.add(makeEditMenu());
    setMenuBar(mb);
    setSize(250, 250);
   
  }

     
  Menu makeEditMenu() {

    Menu editMenu = new Menu("Edit");
    MenuItem mi = new MenuItem("Cut");
    mi.addActionListener(this);
    editMenu.add(mi);
    mi = new MenuItem("Copy");
    mi.addActionListener(this);
    editMenu.add(mi);
    mi = new MenuItem("Paste");
    mi.addActionListener(this);
    editMenu.add(mi);
    mi = new MenuItem("Clear");
    mi.addActionListener(this);
    editMenu.add(mi);

    return editMenu;

  }


  public void actionPerformed (ActionEvent evt) {

    Clipboard clipboard = getToolkit().getSystemClipboard();
    String cmd = evt.getActionCommand();
    if (cmd.equalsIgnoreCase("copy")) {
       StringSelection data = new StringSelection(tf.getText());
       clipboard.setContents(data, data);
    }
    else if (cmd.equalsIgnoreCase("clear")) {
      tf.setText("");
    } 
    else if (cmd.equalsIgnoreCase("paste")) {
      Transferable clipData = clipboard.getContents(this);
      String s;
      try {
        s = (String)(clipData.getTransferData(DataFlavor.stringFlavor));
      } 
      catch (Exception e) {
        s = e.toString();
      }
      ta.setText(s);
    }
    else if (cmd.equalsIgnoreCase("cut")) {
       StringSelection data = new StringSelection(tf.getText());
       clipboard.setContents(data, data);
       tf.setText("");
    }

  }

}