JTree delete node

Question

Have a problem with JTree
A node I call folderNode will normally contain sub-nodes with names lik subnode1,subnode2,subnode3 etc. (Just examples)
The folder node will then represent the range, so for one with the mentioned subnodes, name would be "subnode1- subnode3".
To update this foldername after I have deleted say nr 3, I use "theFolderNode.setUserObject("new name here")), and then treeModel.nodeChanged(theFolderNode); I would then expect "subnode1- subnode2". (Don't mind the method of finding the correct label..)
If I then try to get the new userObject and checking by typing:
System.out.println(theFolderNode.getUserObject().toString()); - I actually get out what I want, but the label of the FolderNode is still not updated..
What am I missing here??

Answer 1

Here is an excert from an article from javaworld
"The Java programmer must keep in mind that it is the garbage collector that runs finalizers on objects. Because it is not generally possible to predict exactly when unreferenced objects will be garbage collected, it is not possible to predict when object finalizers will be run. Java programmers, therefore, should avoid writing code for which program correctness depends upon the timely finalization of objects. For example, if a finalizer of an unreferenced object releases a resource that is needed again later by the program, the resource will not be made available until after the garbage collector has run the object finalizer. If the program needs the resource before the garbage collector has gotten around to finalizing the unreferenced object, the program is out of luck."
http://www.javaworld.com/javaworld/jw-08-1996/jw-08-gc.html
Generally without any tweaking the GC only runs when it has to, so your memory with be recycled then.
You can call System.gc() but that doesn't cause garbage recycling, but rather tells the JVM that you would like to do it, and then it will do it sometime after that.