Java Swing: Syntax Highlighting in JTextPane

Question

I am currently working on an application in Java which has an JTextPane editor which will contain a set of custom expressions.

I am attempting to add Syntax Highlighting to the editor which would make it easier in identifying the different expressions in the editor.

I have generated the tokens which provides the positions to be highlighted but the problem is when there is like 100+ lines of expressions in the editor, it takes a while to highlight the document when changes have been made.

I am using the following function to highlight the different parts of the expressions:

// StyledDocument styledDocument = editorPane.getStyledDocument();

styledDocument.setCharacterAttributes(tokenInfo.getStart(), tokenInfo.getText().length(), style, false);

How may I improve the performance of the syntax highlighting?

Answer 1

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