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Set remove() method in Java with Examples

Last Updated : 31 Dec, 2018

The java.util.Set.remove(Object O) method is used to remove a particular element from a Set.

boolean remove(Object O)

The parameter

is of the type of element maintained by this Set and specifies the element to be removed from the Set.

This method returns True if the specified element is present in the Set otherwise it returns False. Below program illustrate the java.util.Set.remove(Object O) method:

// Java code to illustrate Set.remove() method

import java.util.*;

public class SetDemo {
    public static void main(String args[])
    {
        // Creating an empty Set
        Set<String> set = new HashSet<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 Set
        System.out.println("Set: " + set);

        // Removing elements using remove() method
        set.remove("Geeks");
        set.remove("4");
        set.remove("Welcome");

        // Displaying the Set after removal
        System.out.println("Set after removing elements: "
                           + set);
    }
}

Set: [4, Geeks, Welcome, To]
Set after removing elements: [To]

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