How to make a red zig zag under word in JEditorPane

Question

I need to make a simple spell checker in Java for an application that I am creating and I have searched around and have not found any straight and to the point answers.

Answer 1

You can use a custom Highlighter. See Squiggle Painter as an example.

Answer 2

You may find this custom editor kit example useful. It shows how to extend StyledEditorKit to add attribute to draw custom underline.

If you're up for a complete solution you can go with Jide's StyledLabel. Check it out here. It should be part of jide-oss - common open source library.

Answer 3

I use jtstand's editor and SquiggleUnderlineHighlightPainter, which is also based on javax classes. I use it like this:

JTextComponent editor = //... your editor component;
SquiggleUnderlineHighlightPainter sqpainter = new SquiggleUnderlineHighlightPainter(Color.RED);
try {
    editor.getHighlighter().addHighlight(beginPosition, endPosition, sqpainter);
} 
catch (BadLocationException e) {
    e.printStackTrace();
}

This should work with any javax.swing.text.JTextComponent, including JEditorPane. See addHighlighter.