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About Ilias Tsagklis

Ilias Tsagklis
Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.

LinkedHashSet size example

In this example we shall show you how to get the size of a LinkedHashSet, that is the number of the elements that a LinkedHashSet contains. To get the size of a LinkedHashSet one should perform the following steps:

  • Create a new LinkedHashSet.
  • Populate the set with elements, using the add(E e) API method of LinkedHashSet.
  • Invoke the size() API method of LinkedHashSet to get the number of elements in this set.
  • Remove an element from the set, with remove(Object o) API method and then check its size again,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;
 
import java.util.LinkedHashSet;
 
public class LinkedHashSetSize {
 
  public static void main(String[] args) {
 
    // Create a LinkedHashSet and populate it with elements
    LinkedHashSet linkedHashSet = new LinkedHashSet();
    linkedHashSet.add("element_1");
    linkedHashSet.add("element_2");
    linkedHashSet.add("element_3");

    // int size() method returns the number of elements in the LinkedHashSet   
    System.out.println("Size of LinkedHashSet : " + linkedHashSet.size());
 
    // Remove one element from the LinkedHashSet using remove method
    linkedHashSet.remove("element_2");
    System.out.println("Size of LinkedHashSet : " + linkedHashSet.size());
 
  }
}

Output:

Size of LinkedHashSet : 3
Size of LinkedHashSet : 2

 
This was an example of how to get the size of a LinkedHashSet in Java.

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