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JTree

 
shanthi mahesh
Greenhorn
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Hi,
I have not used JTree before. I need to show my database queries of all Student name (in alpha order) in jTree.
could anyone give me some steps to create a Jtree? I tried to read sun's tutorial..but no where they show how to connect dbquery to jtree.
thanks,
 
Martin Kogut
Greenhorn
Posts: 7
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HI, I think you can set the names a -z with a FileNameFilter!But I'm not very sure!
Good luck!
 
maggie woo
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Posts: 35
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think "TreeModel"
if you know how to get the data, get it into a TreeModel (e.g., javax.swing.tree.DefaultTreeModel or a custom model that you make yourself), then make a JTree and use setModel to put your data on the tree.
That tutorial has a section on creating a TreeModel that might be of some help.
 
Gregg Bolinger
GenRocket Founder
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Chrome IntelliJ IDE Mac OS X
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FYI - There really is nothing in the Core JAVA API that "Connects" a JTree and a Database. You retrieve info from the DB and then build your JTree with that information, like maggie said.
That being said, you could probably hunt the internet for some 3rd party API's that do this automagically for you. But if you are needing to learn then the best thing to do is do it yourself.
It's really not that hard once you understand the TreeModel and DefaultMutableTreeNode, etc. The JDBC stuff is a breeze.
Why don't you see what you can get, provide the code for us to see when you are having issues and we will help you through it.
BTW - It might be a good idea to get the JTree working with some static test data that is hardcoded. Once you have that working replace the hardcoded test data with data from a DB. It won't be difficult.
 
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