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Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Obtain lowest and highest values from TreeSet example

With this example we are going to demonstrate how to obtain the lowest and highest values of a TreeSet. The TreeSet API provides us with methods for such operations. In short, to obtain lowest and highest values of TreeSet you should:

  • Create a new TreeSet.
  • Populate the set with elements, with add(E e) API method of TreeSet.
  • Get the lowest value currently in the TreeSet, with first() API method of TreeSet.
  • Get the highest value that is currently in the TreeSet, with last() API method of TreeSet.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.core;

import java.util.TreeSet;
public class LowHighValuesTreeSet {
  public static void main(String[] args) {
    // Create a TreeSet and populate it with elements
    TreeSet treeSet = new TreeSet();
    // Object first() returns the lowest value in the TreeSet 
    System.out.println("Lowest value in TreeSet is : "  + treeSet.first());
    // Object last() returns the highest value in the TreeSet 
    System.out.println("Highest value in TreeSet is : " + treeSet.last());


Lowest value in TreeSet is : element_1
Highest value in TreeSet is : element_5

This was an example of how to obtain lowest and highest values of a TreeSet in Java.

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