Set addAll() Method in Java

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. Syntax:

boolean remove(Object O)

Parameters: The parameter O is of the type of element maintained by this Set and specifies the element to be removed from the Set. Return Value: 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

// 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);
    }
}

Output:

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

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#remove(java.lang.Object)

Set addAll() Method in Java

gopaldave

Improve

Article Tags :

Practice Tags :

Similar Reads

The Set Interface is present in java.util package and extends the Collection interface. It is an unordered collection of objects in which duplicate values cannot be stored. It is an interface that implements the mathematical set. This interface adds a feature that restricts the insertion of duplicat

Set add() method in Java with Examples

The add() method of Set in Java is used to add a specific element into a Set collection. The set add() function adds the element only if the specified element is not already present in the set else the function returns False if the element is already present in the Set. Declaration of add() methodbo

Set contains() method in Java with Examples

The Java.util.Set.contains() method is used to check whether a specific element is present in the Set or not. So basically it is used to check if a Set contains any particular element. Syntax: boolean contains(Object element) Parameters: The parameter element is of the type of Set. This is the eleme

Set remove() method in Java with Examples

The java.util.Set.remove(Object O) method is used to remove a particular element from a Set. Syntax: boolean remove(Object O) Parameters: The parameter O is of the type of element maintained by this Set and specifies the element to be removed from the Set. Return Value: This method returns True if t

Set addAll() Method in Java

In Java, the addAll() method of the Set class is used to add all the elements of a specified collection to the current collection. The elements are added randomly without following any specific order.Example 1: This example demonstrates how to merge two TreeSet using the addAll() method.Java// Java

Set clear() method in Java with Examples

The Java.util.Set.clear() method is used to remove all the elements from a Set. Using the clear() method only clears all the element from the set and not deletes the set. In other words, we can say that the clear() method is used to only empty an existing Set. Syntax: void clear() Parameters: The me

Set containsAll() Method in Java

The containsAll() method of Set in Java is used to check if a collection contains all the elements of a specified collection. This method is part of the Collection interface. Example 1: This example checks if all elements of one set are present in another set and it will return true if they are iden

Set hashCode() Method in Java

In Java, the hashCode() method is defined in the Object class and is used to generate a hash code for objects. It plays a very important role in hash-based collections like HashMap, HashSet, and HashTable. Example 1: This example demonstrates how hashCode() is used to get the hash code of the HashSe

Set iterator() method in Java with Examples

The java.util.Set.iterator() method is used to return an iterator of the same elements as the set. The elements are returned in random order from what present in the set. Syntax: Iterator iterate_value = Set.iterator(); Parameters: The function does not take any parameter. Return Value: The method i

Set removeAll() Method in Java

In Java, the removeAll() method is part of the Collection interface. It is used to remove all elements from a collection that are present in another collection.Example 1: This example demonstrates how the removeAll() method removes all elements from the first set that are also present in the second