Friday, 1 May 2015

Java TreeSet class

Java TreeSet class

  • contains unique elements only like HashSet. The TreeSet class implements NavigableSet interface that extends the SortedSet interface.
  • maintains ascending order.

Hierarchy of TreeSet class:



Example of TreeSet class:

1.    import java.util.*;  
2.    class TestCollection11{  
3.     public static void main(String args[]){  
4.       
5.      TreeSet<String> al=new TreeSet<String>();  
6.      al.add("Ravi");  
7.      al.add("Vijay");  
8.      al.add("Ravi");  
9.      al.add("Ajay");  
10.   
11.   Iterator<String> itr=al.iterator();  
12.   while(itr.hasNext()){  
13.    System.out.println(itr.next());  
14.   }  
15.  }  
16. }  

Output:Ajay
       Ravi
       Vijay


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