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Showing content from https://www.geeksforgeeks.org/java/abstractcollection-remove-method-in-java-with-examples/ below:

AbstractCollection remove() Method in Java with Examples

Last Updated : 11 Jul, 2025

The

remove(Object O)

method of

Java AbstractCollection

is to remove a particular element from a Collection.

Syntax:

AbstractCollection.remove(Object O)

Parameters:

The parameter

is of the type of Collection and specifies the element to be removed from the collection.

Return Value:

This method returns

True

if the element specified in the parameter is initially present in the collection and is successfully removed otherwise it returns

False

. Below program illustrate the Java.util.AbstractCollection.remove() method:

Program 1

Java


 // Java code to illustrate remove()

import java.util.*;
import java.util.AbstractCollection;

public class AbstractCollectionDemo {
    public static void main(String args[])
    {

        // Creating an empty AbstractCollection
        AbstractCollection<String>
            abs = new TreeSet<String>();

        // Use add() method to add
        // elements into the Collection
        abs.add("Welcome");
        abs.add("To");
        abs.add("Geeks");
        abs.add("4");
        abs.add("Geeks");
        abs.add("TreeSet");

        // Displaying the Collection
        System.out.println("Collection: " + abs);

        // Removing elements using remove() method
        abs.remove("Geeks");
        abs.remove("4");
        abs.remove("TreeSet");

        // Displaying the Collection after removal
        System.out.println("New Collection: " + abs);
    }
}

Output:

Collection: [4, Geeks, To, TreeSet, Welcome]
New Collection: [To, Welcome]

Program 2: Java


 // Java code to illustrate remove()

import java.util.*;
import java.util.AbstractCollection;

public class AbstractCollectionDemo {
    public static void main(String args[])
    {

        // Creating an empty AbstractCollection
        AbstractCollection<String>
            abs = new LinkedList<String>();

        // Use add() method to add
        // elements into the Collection
        abs.add("Welcome");
        abs.add("To");
        abs.add("Geeks");
        abs.add("4");
        abs.add("Geeks");
        abs.add("LinkedList");

        // Displaying the Collection
        System.out.println("Collection: " + abs);

        // Removing elements using remove() method
        abs.remove("Geeks");
        abs.remove("4");
        abs.remove("LinkedList");

        // Displaying the Collection after removal
        System.out.println("New Collection: " + abs);
    }
}

Output:

Collection: [Welcome, To, Geeks, 4, Geeks, LinkedList]
New Collection: [Welcome, To, Geeks]

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