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Java Collection Exercise

Last Updated: 12 August 2025

The Java Collection framework is a fundamental part of the Java programming language, It covers a major part of Java and acts as a prerequisite for many Advanced Java Topi...read more

Java-Collection-Programs

How to Convert a PriorityQueue into an Array, List, and Set in Java?

Last Updated: 23 July 2025

In Java, PriorityQueue is an implementation of the Queue interface. It means high-priority elements can be saved first compared to lower-priority elements in the queue, an...read more

How to Access Elements of Set of Maps in C++?

Last Updated: 23 July 2025

In C++, a set of maps can be used to store multiple maps of key-value pairs sorted according to their number and values of elements such as graphs. In this article, we wil...read more

Java Program to Create Set of Pairs Using HashSet

Last Updated: 23 July 2025

Problem statement: We need to find and print unique pairs among all given pairs.Generally, if we have to find the unique numbers among all given numbers then we just put a...read more

Java

Java Programs

java-set

Difference Between List and Set in Java

Last Updated: 04 June 2026

In Java Collections, List and Set are two fundamental interfaces used to store groups of objects. Both are part of the Collection Framework, but they differ in how they st...read more

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Java-Collections

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java-list

Difference between List, Set and Map in Java

Last Updated: 06 June 2026

In Java Collections Framework, List, Set, and Map are the most commonly used collection types for storing and managing data. Each serves a different purpose based on how e...read more

Set toArray() Method in Java

Last Updated: 11 July 2025

In Java, the toArray() method is used to convert a collection to an array. It returns an array containing all the elements in the collection in the correct order.Example 1...read more

Set size() method in Java with Example

Last Updated: 26 July 2024

The java.util.Set.size() method is used to get the size of the Set or the number of elements present in the Set. Syntax:int size()Parameters: This method does not take any...read more

Set retainAll() Method in Java

Last Updated: 11 July 2025

In Java, the retainAll() method is used to retain only the elements in a collection that are also present in another collection. It modifies the current collection by remo...read more

Set removeAll() Method in Java

Last Updated: 11 July 2025

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: ...read more

Set remove() method in Java with Examples

Last Updated: 26 December 2025

The java.util.Set.remove(Object o) method is used to remove a specific element from a Set. It returns true if the element was present and successfully removed, otherwise, ...read more

Set iterator() method in Java with Examples

Last Updated: 31 December 2018

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.S...read more

Set isEmpty() method in Java with Examples

Last Updated: 31 December 2018

The java.util.Set.isEmpty() method is used to check if a Set is empty or not. It returns True if the Set is empty otherwise it returns False.Syntax:boolean isEmpty()Parame...read more

Set hashCode() Method in Java

Last Updated: 11 July 2025

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 lik...read more

Set equals() Method in Java

Last Updated: 11 July 2025

In Java, the equals() method of the Set class is used to compare two sets for equality. It checks if two sets contain the same elements regardless of their order.Example 1...read more

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