DefaultMutableTreeNode problem

aidan_walsh

Can anybody see whats wrong here?

I have a Vector of Files, which I want to parse through and plot on a tree. The code I'm using is below. I decided to try to parse through the paths of the files, and placing each of them as children of the root node. The problem is when I return the root node all I get is a returned null value.

I think the problem may lie in !root.isNodeDescendent(child), and I used this as the Javadoc tells me that "a node is considered a descendant of itself" - therefore if the root is null, it is not a descendant and the child should be added...

Thanks in advance!

public DefaultMutableTreeNode describeAsTree()
  {
    DefaultMutableTreeNode root = null;
    DefaultMutableTreeNode child;
    java.util.StringTokenizer parser;
    File individual;

    for(int i = 0; i < fileStructure.size(); i++)
    {
      individual = (File)fileStructure.elementAt(i);
      parser = new java.util.StringTokenizer(individual.getAbsolutePath(), "/");

      while(parser.hasMoreTokens())
      {
        child = new DefaultMutableTreeNode(parser.nextToken());
        if(!root.isNodeDescendant(child))
          root.add(child);

        root = child;
      }
    }

    return root;
  }

vorbis

I'd say the line root = child is a bit wonky. You're setting the root equal to the child with that line. I presume that you want to return the overall root. Also you should use system.out.println() to check if if(!root.isNodeDescendant(child)) is working. Not sure after that.