Mapping JTree to an Access Database

Question

First of all, I am very new to using JTree.
Second, I was able to create a JTree using QueryDataSet from an Access database (using JBuilder).
The database table has the following structure:
NodeID, ParentNodeID and Name.
NodeID is unique.
the problem I am facing is how to bind or map each node created to the corresponding NodeID, while I am displaying the Name field as the userObject of the node?
I want to know this in order to retrieve information from the database regarding the selected node, and can only do that with the NodeID since there are duplicate names for the "Name" field.
If anyone has an answer to this question please do not hesitate to reply or send me an email.
Regards,
Charbel
[email protected]

Answer 1

Build a class to put all the db values:
class MyNode{
int NodeID;
int parentID;
int NodeID;
String Name;
public MyNode(int NodeID,int parentID,String Name){
this.NodeID = NodeID;
this.parentID = parentID;
this.Name = Name;
public String toString(){
return Name; // this is for the three to show the Name variable
I guess you will previously sort ascending the access table on the parentID field, in order to easily build the tree.
When you read from the database, create MyNode instances and fill in the values, and set in teh TreeNode the user object like:
MyTreeNode mtn = new MyTreeNode(new MyNode(20,3,"OneNode"));
or
mtn.setUserObject(new MyNode(20,3,"OneNode"));
From this structure, you will easily build any popups or actions responding to click events on the tree branches, by simply requesting the user object of the node, and reading its properties.
Hope it helped,
Carlos.