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Let's Begin

Course Introduction Introduction to Collections

Lists in Java

ArrayList: Introduction ArrayList: Inserting and Retrieving Elements ArrayList: Operations ArrayList: Iteration ArrayList: Iteration using ListIterator ArrayList Sorting Understanding Comparable Interface Understanding Comparator Interface ArrayList: Exercise ArrayList: Exercise Solution Quiz: ArrayList

LinkedList in Java

LinkedList: Introduction LinkedList: Fetching and Removing

CopyOnWriteArrayList in Java

CopyOnWriteArrayList: Introduction CopyOnWriteArrayList: Internal Working CopyOnWriteArrayList: Iteration

Sets in Java

HashSet: Creation and Insertion

HashSet: Operations

HashSet: Iteration and Sorting

HashSet: Exercise

HashSet: Exercise Solution

TreeSet in Java

TreeSet: Creation and Insertion TreeSet: Fetching and Removal TreeSet: Exercise TreeSet Exercise Solution

HashMap In Java

HashMap: Creation and Insertion HashMap: Updation and Removal HashMap: Operations HashMap: Java 8 Improvements HashMap: Internal Implementation HashMap: How to Design a Good Key HashMap: Iteration HashMap: Exercise HashMap: Exercise Solution HashMap: Quiz

TreeMap in Java

TreeMap: Creation and Insertion TreeMap: Fetching and Removal TreeMap: Sorting a TreeMap by Values TreeMap: HashMap Sorting

LinkedHashMap in Java

LinkedHashMap: Introduction LinkedHashMap: Internal Working

Additional Map Implementations

ConcurrentHashMap IdentityHashMap EnumMap

Arrays Class

Searching an Array Sorting an Array Copying an Array Arrays: Operations Quiz: Arrays

Collections Class

Finding the Min and Max element Searching, Filing, and Copying Collection Making Collections Unmodifiable Making Collections thread-safe Thank You!

Collections in Java/

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HashSet: Exercise

HashSet: Exercise

Let's work on a HashSet exercise.

We'll cover the following...

- Problem: Find duplicate element

Problem: Find duplicate element

You are given an array in which all the elements are unique except one element. You need to find the duplicate element.

For example, the array ...

Ask