Java - How to use system clipboard to copy and paste objects(JLabel or JButton) in a JFrame

Although you can in theory put pretty much anything you like on the clipboard, it can be difficult.
You can use XMLEncoder to convert your Swing objects to a simple text String that is really easy to put on the clipboard, and XMLDecoder to re-create the object from the clipboard text. Documentation is in the usual places.

I am able to copy and paste strings using java.awt.datatransfer.StringSelection.
By using my custom class with implementing Transferable,ClipboardOwner i can copy and paste image also(Using DataFlavor.imageFlavor). It was easy to do. In a same way how i can do it for Swing components.. I dont have any idea on XMLEncoder and
XMLDecoder... Sorry to say this.. Is there any other way?

Is there any other way?

Yes, probably, maybe a custom DataFlavor...
But it's so easy and generalisable to convert any bean-like object to a plain String and back, that IMHO it's the easiest way to get the job done.
Here's a little bit of code to illustrate the XML encode/decode stuff...

public static String objectToXML(Object o) {
      ByteArrayOutputStream os = new ByteArrayOutputStream();
      XMLEncoder en = new XMLEncoder(os);
      en.writeObject(o);
      en.close();
      return os.toString();
   }
   
   public static Object  objectFromXML(String s) {
      ByteArrayInputStream is = new ByteArrayInputStream(s.getBytes());
      XMLDecoder de = new XMLDecoder(is);
      return de.readObject();
   }

   public static void main(String[] args) {

      JButton jb = new JButton("Hello, world");
      jb.setActionCommand("command");
      jb.setBounds(0, 0, 100, 10);

      String s = objectToXML(jb);
      System.out.println(s);

      Object o = objectFromXML(s);
      System.out.println(o);
   }
Comments
Usefull

James
Thanks a lot. I have used XMLEncoder and XMLDecoder. It is working finely
for swing components. But it is not working for Netbeans Custom classes.Now i
want to encode and decode netbeans visual api widget classes.

After encoding swing JButton in to xml i can able to see the following.

<?xml version="1.0" encoding="UTF-8"?>
<java version="1.6.0_18" class="java.beans.XMLDecoder">
<object class="java.awt.Button">
<void property="background">
<object class="java.awt.Color">
<int>236</int>
<int>233</int>
<int>216</int>
<int>255</int>
</object>
</void>
<void property="bounds">
<object class="java.awt.Rectangle">
<int>100</int>
<int>100</int>
<int>100</int>
<int>40</int>
</object>
</void>
<void property="actionCommand">
<string>OLD</string>
</void>
<void property="label">
<string>OLD</string>
</void>
<void property="name">
<string>button0</string>
</void>
</object>
</java>


But when i encoded Netbeans visual api widget in to xml,only body is coming without contents..as follows.

<?xml version="1.0" encoding="UTF-8"?>
<java version="1.6.0_18" class="java.beans.XMLDecoder">
</java>

Why it is not supporting for custom classes i dont know. If i will get any idea that will be helpful for me.

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