• September 1, 2014
  • Core Java
  • Comments Off on TreeSet in java

TreeSet in java

TreeSet:

TreeSet extends AbstractSet and implements the NavigableSet interface. It maintains ascending order for its elements i.e. elements will be in sorted form.

 TreeSet example:

TreeSetTest.java

import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
 
/**
 * This class is used to show the TreeSet functionality.
 * @author javawithease
 */
public class TreeSetTest {
	public static void main(String args[]){
		//Create TreeSet object.
		Set treeSet = new TreeSet();
 
		//Add objects to the HashSet.
		treeSet.add("Roxy");
		treeSet.add("Sunil");
		treeSet.add("Sandy");
		treeSet.add("Munish");
		treeSet.add("Pardeep");
 
		//Print the TreeSet object.
		System.out.println("TreeSet elements:");
		System.out.println(treeSet);
 
		//Print the TreeSet elements using iterator.
		Iterator iterator=treeSet.iterator();
		System.out.println("TreeSet elements using iterator:");
		while(iterator.hasNext()){  
		   System.out.println(iterator.next());  
		}  
	}
}

Output:

TreeSet elements:
[Munish, Pardeep, Roxy, Sandy, Sunil]
TreeSet elements using iterator:
Munish
Pardeep
Roxy
Sandy
Sunil

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