How to implement a tree data-structure in Java?

Question

Is there any standard Java library class to represent a tree in Java?

Specifically I need to represent the following:

• The sub-tree at any node can have

Answer 1

Here:

public class Tree {
    private Node root;

    public Tree(T rootData) {
        root = new Node();
        root.data = rootData;
        root.children = new ArrayList>();
    }

    public static class Node {
        private T data;
        private Node parent;
        private List> children;
    }
}

That is a basic tree structure that can be used for String or any other object. It is fairly easy to implement simple trees to do what you need.

All you need to add are methods for add to, removing from, traversing, and constructors. The Node is the basic building block of the Tree.