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

There is actually a pretty good tree structure implemented in the JDK.

Have a look at javax.swing.tree, TreeModel, and TreeNode. They are designed to be used with the JTreePanel but they are, in fact, a pretty good tree implementation and there is nothing stopping you from using it with out a swing interface.

Note that as of Java 9 you may wish not to use these classes as they will not be present in the 'Compact profiles'.