How to show empty directories in JTree ?

ni4ni · #1 (**permalink**) 29-04-2010, 08:27 AM

Hello

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 ?

Thanks

Guy

Darryl.Burke · #2 (**permalink**) 30-04-2010, 05:55 AM

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

Java Code

FileSystemView fileSystemView = FileSystemView.getFileSystemView();
setIcont(fileSystemView.getSystemIcon(myFile));

or

Java Code

JFileChooser fileChooser = new JFileChooser();
setIcon(fileChooser.getIcon(myFile));

where myFile is the UserObject of the node, cast to File.

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

db

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