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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 HashSet: Quiz

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

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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HashMap: Operations

HashMap: Operations

Let's discuss some HashMap operations.

We'll cover the following...

Operations on HashMap

Checking if a key is present in the HashMap

We can use the containsKey(Object key) method to check if a given key is present in the HashMap. This method returns true ...