Learn Java Collections
Explore the Java Collections Framework and Algorithms
Learn Java Collections with Practical Examples
Working with collections well is an essential part of how we code in Java. Yes, the Collections framework gives us ready-made structures and algorithms we can use to perform common operations on groups of elements. But knowing how they work, what to use and when – that’s critical.
The Collections API is a foundational part of the language and has really stood the test of time, at the core, but also greatly evolved and improved with each and every JDK release.
In this material, we’ll start by understanding why collections are useful and get a high-level overview of the class hierarchy.
Then, we’ll learn how to define different types of collections, including lists, sets, and maps, how to choose the right type for your use case, and how to work with them in practice.
Actual coding practice through a Java project – definitely the best way to learn how to work with collections
The essential path to working with collections in Java, professionally. The 6 modules build a solid base of understanding commonly used collections, operations over them, how and when to use each, and the new improvements in newer JDKs.
Everything you need to understand the Java Collections API and be prepared for both in-depth collections interview questions or going through the Oracle certification.
1. Overview of Java Collections
3 LESSONS (Text) ~ 1 HOUR
- From Arrays to Collections
- Overview of the Java Collections Framework (preview lesson)
- Working with Arrays
2. Deep Dive Into Lists
4 LESSONS (Text) ~ 3 HOURS
- Introduction to ArrayLists
- Basic ArrayList Operations
- Bulk Operations on Lists (preview lesson)
- Introduction to LinkedLists
3. Iteration and Comparison
3 LESSONS (Text) ~ 2 HOURS
- Enhanced For-Loops: A Simple Iteration Technique
- Iterators: Fine-Grained Control Over Traversal
- Sorting Collections with Comparable and Comparator
4. Working with Sets
4 LESSONS (Text) ~ 3 HOURS
- Introduction to HashSet
- Basic HashSet Operations
- LinkedHashSet: Preserving Insertion Order
- TreeSet: Sorted Set and Natural Ordering (preview lesson)
5. Working with Maps
5 LESSONS (Text) ~ 3 HOURS
- Introduction to HashMap
- Basic HashMap Operations
- Iterating Over HashMaps
- LinkedHashMap: Maintaining Insertion Order
- TreeMap: Sorted Maps and Natural Ordering
6. Other Collection Types
7 LESSONS (Text)
- Sequenced Collections
- The Collections Class: Utility Methods and Best Practices
- Generics: A Quick Primer
- Overview of Queues
- Deciding Which Collection to Use
- Select the Right Collection
- Legacy Collection
The lessons in this course are text-based, with a full project backing each one.
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