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Asked: 2026-05-11T11:31:27+00:00

In a JTextPane with a DefaultStyledDocument the document structure (hierarchy of Element objects) ends

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In a JTextPane with a DefaultStyledDocument the document structure (hierarchy of Element objects) ends with a LeafElement that spans all the character of the enclosing paragraph. Is there a way to customize the document such that each leaf element will represent a single character?

(Background: I am trying to implementing a custom coloring scheme – somewhat similar to syntax coloring in an IDE. Using setCharacterAttributes() for this purpose is not an option, mainly due to performance considerations.)

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  1. You may be interested in jsyntaxpane. It uses a PlainDocument instead of using the more resource hungry StyledDocument. A Leaf for each character will require lots of memory, so you may want to use a leaf for each ‘Token’.

    You can also use a StyledDocument then update the style for each Token in a separate Thread.

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