Text editor in Java with sample functions for desktop application

I have a project, I'm creating an application in Java and I need text editor with sample functions (Bold, Italic, Size, Align, Undo, Redo).

So is there a class in Java for this purpose or a tutorial to show how to develop it?

I tried to style text in a jTextPane but when I change a word in bold, the whole text become in bold.

I want just to stylize the selected text only.

This should get you started: Editor based on JTextPane

Or this tutorial: How to Use Editor Panes and Text Panes

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