Check if a particular value exists in Java TreeSet example

This Java Example shows how to check if TreeSet object contains a particular value using contains method of TreeSet class.

import java.util.TreeSet;
public class CheckValueOfTreeSetExample {

 public static void main(String[] args) {

  // create TreeSet object
  TreeSet tSet = new TreeSet();

  // add elements to TreeSet
  tSet.add("1");
  tSet.add("3");
  tSet.add("2");
  tSet.add("5");
  tSet.add("4");

  /**
   * To check whether a particular value exists in TreeSet use boolean
   * contains(Object value) method of TreeSet class. It returns true if
   * the TreeSet contains the value, otherwise false.
   **/

  boolean blnExists = tSet.contains("3");
  System.out.println("3 exists in TreeSet ? : " + blnExists);
 }
}

The output is:


3 exists in TreeSet ? : true