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Editorial Team
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Asked: 2026-05-14T23:46:40+00:00

I have a JTree which I give objects that implement the TreeNode interface, and

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I have a JTree which I give objects that implement the TreeNode interface, and a custom TreeModel to display them (not using DefaultMutableTreeNode). I would like to change the text colour of some nodes. I can’t find anything in the docs, except javax.swing.tree.DefaultTreeCellRenderer.setTextNonSelectionColor(Color newColor), but it will change everything indiscriminately, and I only need it for some nodes (specifically, broken links, i.e. nodes whose corresponding files can’t be found on the disk, should be greyed out, the rest should be default). Can it be done, and how?

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1 Answer

  1. Editorial Team

    You are close to your answer. What you need to do is Sub Class the DefaultTreeCellRenderer and override a few of the DefaultTreeCellRenderer‘s methods. Then make sure you tell the tree to use your custom cell renderer.

    What you will need to do is have some state variables that indicate whether or not a link is broken, and set the color of the node based on that.

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