Learn about collections in Java such as LinkedLists, HashSet, HashMap and more.

Java for Programmers

Collections is one of the most important topics for Java Programming. Without the proper knowledge of every collection type in Java, it becomes difficult for you to decide which option to pick in a particular scenario.

This course will give you a great understanding of all collection types available in the Collections Framework like lists, linked lists, sets, and hashmaps.

After completing this course, you will know how data can be modified within a collection, how to sort a collection, and how it can be made thread-safe. You will also cover the internal working of each Java collection so you can work with them more efficiently.

Java Collections

## Converting an Array into a List

We can convert an array into a list using the `asList()` method. If any changes are made to the resulting list, then changes are propagated to the original array. The `asList()` method returns a fixed-size list, so it is not possible to add or remove elements from this list.

# Converting an Array into a List

We can convert an array into a list using the `asList()` method. If any changes are made to the resulting list, then changes are propagated to the original array. The `asList()` method returns a fixed-size list, so it is not possible to add or remove elements from this list.

Let's discuss some operations that can be performed using the Arrays class.

Introduction

ArrayList

LinkedList

CopyOnWriteArrayList

HashSet

TreeSet

HashMap

TreeMap

LinkedHashMap

Additional Map Implmentations

Arrays

Collections class

Additional Operations

Converting an Array into a List