how to get everything in DefaultTreeNode

843806

How do I get everything include the child of a child of a child of the root?

I'm using the TreeDemo.java as an example. Using the DefaultMutableTreeNode, top, I want to be able to get everything including all the books by calling one method with top as either the object or the parameter. how can I do this?

800346

We can walk through the JTree recursively, something like this:

    public void traverse(JTree tree) {
        TreeModel model = tree.getModel();
        Object root;
        if (model != null) {
            root = model.getRoot();
            walk(model,root);
        } else{
            System.out.println("Tree is empty.");
        }
    }
    protected void walk(TreeModel model, Object o){
        int  cc;
        cc = model.getChildCount(o);
        for( int i=0; i < cc; i++) {
            DefaultMutableTreeNode child = (DefaultMutableTreeNode) model.getChild(o, i );
            if (model.isLeaf(child) ){
                System.out.println(child);
            }else {
                System.out.println(child);
                walk(model,child );
            }
        }
    }

843806

Hello. I actually wanted to get everything from the DefaultMutableTreeNode like an enumeration cuz i thought that all elements inside that class are stored in a private array built in that class, or something like that. I thought there would be a method that would save me a lot of processing time since everytime i walk through it, I access the database and it takes up a lot of time. I actually have that code but since you already did it for me with the using of extracting the TreeModel from JTree, I think it would save me a lot of time aside from connecting to the database for each node. Thanks a lot.