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Thread: How to show empty directories in JTree ?

  1. #1
    Junior Member
    Join Date
    Mar 2010
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    Default How to show empty directories in JTree ?


    I am trying to use JTree to show a directory tree on my filesystem.
    The problem is that some of the directories on the file system are empty. JTree, in its default behavior, assumes that a node that does not have children is a leaf node and changes its icon accordingly.

    I want "directory" node to show as directories and only "file" nodes to show as leaf nodes.
    How do I change JTree's default behavior ?



  2. #2
    Member Darryl.Burke's Avatar
    Join Date
    Mar 2010
    Madgaon, Goa, India
    Thanked 48 Times in 46 Posts

    Default Re: How to show empty directories in JTree ?

    I presume you are populating the JTree with File objects. If not, you need to do this first.

    Use a custom renderer that sets the icon. You can use either
    FileSystemView fileSystemView = FileSystemView.getFileSystemView();
    JFileChooser fileChooser = new JFileChooser();
    where myFile is the UserObject of the node, cast to File.

    Try one of those and post back if you get stuck anywhere.


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