Database and JTree

Question

I have table in access entitled employees and wish to generate a JTree to show the organizational heirarchy of the company. I feel like I've followed the steps properly but the Jtrees either don't work or they work with the wrong data.
"Perform a query to obtain the name of the employee. If you are at the root node (level 0), just change the value of the current node to the name you got from the query, otherwise, create a child node and set its value to be that name. Perform another query to get the employee IDs of all the employees whose manager is the current employee. Loop through this result set, recursively calling the method for each of the employees in the resultset from step (4)."[]
    public static void generateTree(DefaultMutableTreeNode node, int id, int level){
        DbSource dbs = new DbSource("EmpDb");
        if (dbs.isConnected()){
         boolean success = dbs.processQuery("select firstname, lastname from employees", false);
         if(success){
             while(dbs.nextRecord()){
              DefaultMutableTreeNode newNode;
                if (level==0){
                    node.setUserObject(dbs.getField(1)+ " " + dbs.getField(2));
                    newNode=node;
                else{
                    newNode = new DefaultMutableTreeNode(dbs.getField(1) + " " + dbs.getField(2));
                    node.add(newNode);               
             boolean success2 = dbs.processQuery("select employeeid from employees where " + id+ " = manager", false);
             if (success2){
             while (dbs.nextRecord()){
                  generateTree(newNode, id, level+1);                      
    }Any quick hints are appreciated.

Answer 1

Well, you didn't say what was wrong with the result of this. But that doesn't matter because I can see a lot of things wrong with the code.
First you don't have anything that gets the level-zero node. (The president of the company or whatever that is.) You should do this outside the recursively-called method and create a node that contains that person's name. Then call the method, passing it that node.
Second, in your posted code you have something that reads the entire file at every level. What's that for?
Third, the last four lines of that method look like the actual code you need: get the employees who report to the manager in the current node. However you need something that creates a new node for each of those employees and adds it to the manager node.
Fourth, you don't seem to use that "level" parameter anywhere. I don't think you have any need for it.
Fifth, and I don't know if this is a problem, you will need to be able to process several DbSource objects simultaneously. Possibly you can, but it's possible to code that sort of thing so that you can't.