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Editorial Team
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Asked: 2026-05-29T04:27:52+00:00

I have a JTextArea which has its text set to a string of information.

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I have a JTextArea which has its text set to a string of information. In this string of information I have a variable which I would like coloured red, to do this I edit the string as follows:

"Result: <html><font color=red>" + negativeValue + "</font></html>"

I would expect this to give Result: ## where the number is red. However it just puts the following into the text area:

Result: <html><font color=red>##</font></html>

I’m not really sure how to get this working, so could someone offer advice as to how to do so?

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1 Answer

  1. Editorial Team

    JTextArea is not a component designed for styled text. If the text can be all one color, call setForeground(Color).

    Otherwise use a styled text component such as a JEditorPane or JTextPane. For more info. on using them, see How to Use Editor Panes and Text Panes.

    Also as pointed out by others, the entire String must start with <html> .

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