Beginner's Guide to Java Collections
This course covers the fundamentals of java collections framework covering different data structures in Java to store, group, and retrieve objects.
What you'll learn
- Understand the Java Collections Framework and when to use each data structure
- Work with List implementations like ArrayList, LinkedList, and Vector
- Use Set and Map implementations such as HashSet, TreeMap, and HashMap
- Explore Queue and Deque implementations like PriorityQueue, Stack, and ArrayDeque
- Choose the right collection type to write efficient, scalable Java code
Prerequisites
- Basic understanding of Java programming language
- Familiarity with object-oriented programming concepts
- Understanding of basic data structures (arrays, linked lists)
Overview
Welcome to "Beginner's Guide to Java Collections Course" - your complete guide to understanding and implementing Java's powerful collections framework. This comprehensive course takes you on a journey from basic data structures to advanced collection implementations, equipping you with the knowledge and skills needed to write efficient, scalable Java applications.
This course is ideal for:
- Java developers looking to strengthen their fundamentals
- Programming students transitioning from basic Java to intermediate concepts
- Software engineers wanting to optimize their code using appropriate data structures
- Backend developers working with data-intensive applications
- Anyone preparing for Java technical interviews
- 01Introduction to Java Collections3 min
- 02ArrayList in Java11 min
- 03LinkedList in Java9 min
- 04CopyOnWriteArrayList in Java4 min
- 05Vector in Java5 min
- 06Stack in Java5 min
- 07HashSet in Java8 min
- 08LinkedHashSet in Java3 min
- 09TreeSet in Java4 min
- 10PriorityQueue in Java6 min
- 11DelayQueue in Java4 min
- 12ArrayDeque in Java5 min
- 13HashMap in Java7 min
- 14LinkedHashMap in Java4 min
- 15IdentityHashMap in Java3 min
- 16TreeMap in Java6 min
- 17Hashtable in Java2 min
Nilanchala Panigrahy
Software Architect based in London with 19+ years of experience designing and scaling mission-critical backend systems. Nilanchala has worked on large-scale enterprise platforms, led digital transformation initiatives, and guided teams through complex system design decisions where reliability, security, and maintainability actually matter.
Beyond architecture, he's passionate about mentorship — helping developers bridge the gap between writing clean code and designing robust systems.