TreeSet is the SortedSet interface in Java that uses a Tree for storage. TreeSet applies the natural order of the elements. Here, In this post, we will see “how to create a TreeSet and how to iterates its data?”

Syntax:

Set<Integer> setOfIntegers = new TreeSet<>();

Note: In the above syntax sample, we are creating a TreeSet of type Integer.

Example

import java.util.Set;
import java.util.TreeSet;

public class TreeSetSample {

	public static void main(String[] args) {
		
        //Creating a TreeSet of Integer
		Set<Integer> setOfIntegers = new TreeSet<>();
		
		setOfIntegers.add(107);
		setOfIntegers.add(90);
		setOfIntegers.add(95);
		setOfIntegers.add(95);
		
		System.out.println("Iteration over Set of Integers:");
		for(int t : setOfIntegers){
		System.out.println(t);
		}
		
        //Creating a TreeSet of String
		Set<String> setOfStrings = new TreeSet<>();

		setOfStrings.add("Yogi");
		setOfStrings.add("Gaurangee");
		setOfStrings.add("Pulkit");
		setOfStrings.add("Yashika");
		setOfStrings.add("Yash");
        setOfStrings.add("Isha");
		setOfStrings.add("Deepak");

		System.out.println("Iteration over Set of Strings:");
		for(String t : setOfStrings){
			System.out.println(t);
		}
		
		
	}
}

Output:

Iteration over Set of Integers:
90
95
107
Iteration over Set of Strings:
Deepak
Gaurangee
Isha
Pulkit
Yash
Yashika
Yogi

If you like this post, please click like button and share it with others on Twitter. Also, check out my other useful blog posts on Java:

• HashSet Example in JAVA
• HashTable Example in JAVA

Other Useful References:

• TreeSet – Oracle docs