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

You can use TreeSet class in java.util.*. It is working like Binary search tree, so it is already sorted. TreeSet class implements Iterable, Collection and Set interfaces. You can traverse through the tree with iterator like a set.

TreeSet treeSet = new TreeSet();
Iterator it  = treeSet.Iterator();
while(it.hasNext()){
...
}

You can check, Java Doc and some other .