ClassNotFoundException in TransferHandler

[Steli Niculescu]

First of all, excuse my bad english

I asked a question yesterday about how to cut/copy/paste styled text in a JTextPane and nobody answered . I did some research myself and i found i need to write my own TransferHandler for a class to store the transfered data.

I made this class, which contains a simple String and a list of attributes for each of the elements which will be contained in the text.

  package com.twip.editor.controller;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.swing.text.AttributeSet;
import javax.swing.text.Style;

import com.twip.editor.controller.TextController.Location;

public class StyledString {
	String text;
	List<AttributeSet> attrs;
	List<Location> locs;
	Style logicalStyle;

	public StyledString(String text) {
		this.text = text;
		attrs = new ArrayList<AttributeSet>();
		locs = new ArrayList<Location>();
	}

	public void addAttributes(AttributeSet atts, int start, int end) {
		attrs.add(atts);
		locs.add(new Location(start, end));
	}

}
  

I created a TransferHandler which uses this mime type, and tries to create a DataFlavor based on it. If the class cannot be found, a ClassNotFoundException is thrown.

 package com.twip.editor.controller;

import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.InputEvent;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.swing.JComponent;
import javax.swing.JTextPane;
import javax.swing.TransferHandler;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.Style;
import javax.swing.text.StyledDocument;

import com.twip.editor.controller.TextController.Location;

public class StyleTransferHandler extends TransferHandler {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1069845573297382298L;
	String mimeType = DataFlavor.javaJVMLocalObjectMimeType
			+ ";class=StyledString";
	DataFlavor styledStringFlavor;

	public StyleTransferHandler() {
		try {
			styledStringFlavor = new DataFlavor(mimeType);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}

      /* other code.. */
   

As you can see, the classes are in the same package, I can't imagine why the class cannot be loaded.

java.lang.ClassNotFoundException: StyledString
at java.awt.datatransfer.DataFlavor.tryToLoadClass(Unknown Source)
at java.awt.datatransfer.DataFlavor.initialize(Unknown Source)
at java.awt.datatransfer.DataFlavor.<init>(Unknown Source)
at com.twip.editor.controller.StyleTransferHandler.<init>(StyleTransferHandler.java:36)
at com.twip.editor.controller.TextController.initUI(TextController.java:565)
at com.twip.editor.controller.TextController.<init>(TextController.java:73)
at com.twip.editor.controller.TextController$2.run(TextController.java:511)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[Rob Spoor]

The class name is not StyledString but com.twip.editor.controller.StyledString - including the full package name.

[Steli Niculescu]

It works! Thank you