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LinkedHashSet add() method in Java with Examples

Last Updated : 30 Sep, 2019

The add() method in Java LinkedHashSet is used to add a specific element into a LinkedHashSet. This method will add the element only if the specified element is not present in the LinkedHashSet else the function will return False if the element is already present in the LinkedHashSet.

Hash_Set.add(Object element)

The parameter

is of the type LinkedHashSet and refers to the element to be added to the Set.

The function returns True if the element is not present in the LinkedHashSet otherwise False if the element is already present in the LinkedHashSet. Below program illustrate the Java.util.LinkedHashSet.add() method:

// Java code to illustrate add()
import java.io.*;
import java.util.LinkedHashSet;

public class LinkedHashSetDemo {
    public static void main(String args[])
    {
        // Creating an empty LinkedHashSet
        LinkedHashSet<String> set = new LinkedHashSet<String>();

        // Use add() method to add elements into the Set
        set.add("Welcome");
        set.add("To");
        set.add("Geeks");
        set.add("4");
        set.add("Geeks");

        // Displaying the LinkedHashSet
        System.out.println("LinkedHashSet: " + set);
    }
}

LinkedHashSet: [Welcome, To, Geeks, 4]

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