Tree Data-Structure

#1

Is there any inbuilt data structure that we can use for tree implementation?

#2

As mentioned earlier, there are two variety of tree implementation in Java collection framework. One is TreeSet and another is TreeMap. They are defined in the java.util package as follows:

public class TreeSet<E>
   extends AbstractSet<E>
   implements NavigableSet<E>, Cloneable, Serializable


public class TreeMap<K, V>
   extends AbstractMap<K, V>
   implements NavigableMap<K, V>, Cloneable, Serializable

you can see this for reference

https://www.developer.com/java/data/understanding-java-tree-apis.html#:~:text=The%20TreeSet%20and%20TreeMap%20classes,in%20the%20Java%20API%20Library.