Basics Writer – Page 2

Difference between HashMap and HashTable

April 6, 2025April 3, 2025 by Basics Writer

A HashMap is a part of the Java Collections Framework and is used to store data in key-value pairs. It allows one null key and multiple null values, and it is not synchronized, making it faster but not thread-safe. A Hashtable is a legacy class in Java that also stores data in key-value pairs. It … Read more

ArrayList

April 4, 2025March 29, 2025 by Basics Writer

An ArrayList in Java is a resizable array that can store a collection of elements. It allows you to add, remove, and access elements, and automatically adjusts its size as needed when elements are added or removed. Unlike regular arrays, you don’t need to specify the size in advance. It is a class in Java … Read more