Remove element from TreeSet example

In this example we shall show you how to remove an element from a TreeSet. To remove an element from a TreeSet, if it exists in the set one should perform the following steps:

  • Create a new TreeSet.
  • Populate the set with elements, with add(E e) API method of TreeSet.
  • Remove an element from the TreeSet. Invoke the remove(Object o) API method of TreeSet. It removes the specified element from the set, if the element exists in the set. The method returns true if the set contained the element and false otherwise,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;

import java.util.TreeSet;
public class RemoveElementTreeSet {
  public static void main(String[] args) {
    // Create a TreeSet and populate it with elements
    TreeSet treeSet = new TreeSet();
    System.out.println("TreeSet contents : " + treeSet);

    // boolean remove(Object o) method removes the specific object from the TreeSet if present and returns true, false otherwise
    boolean removed = treeSet.remove("element_2");
    System.out.println("TreeSet contents after removal of element_2 : " + treeSet);



TreeSet contents : [element_1, element_2, element_3]
TreeSet contents after removal of element_2 : [element_1, element_3]

This was an example of how to remove an element from a TreeSet in Java.

Byron Kiourtzoglou

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.
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