Data Structures in Java Live Class 2019-02-21
A thorough look at the collection classes in java.util.** in Java
This is a live virtual class running on February 21st, 2019 from 07:00-11:00 PST, 10:00-14:00 EST, 15:00-19:00 UTC
Anyone registered will get access to the recording.
Java programmers typically use only very few collection classes for all of their work. Often they chose inappropriate ones. In this course, we will look at what each collection costs and when you should use which one. Some of the questions will we answer include: Which is the best Collection to use in Java? When do you need to employ ConcurrentSkipListSet? What is the computational time complexity of WeakHashMap?
What you'll learn-and how you can apply it
- Java has an overwhelming number of interfaces and classes in the java.util.** packages. In this course you will learn what they are and when to use which. Is ArrayList better than LinkedList? What is the difference in space complexity between the two classes?
- Choosing the correct collection can make our code more succinct. For example, the new List.of() syntax in Java 9 is better at creating immutable lists.
- By looking at hashing closely, we can learn how to write hashing functions that produce a 3x performance improvement for HashMap and ConcurrentHashMap.
- We learn when to use which concurrent classes and which to avoid.
This training course is for you because...
- Junior and intermediate Java programmers wanting to understand collections better.
- Advanced programmers who want to acquire additional skills.
Prerequisites
- Attendees should be familiar with basic Java code, but a CS degree is not assumed
- Should know at least Java 6. We are covering all relevant collection classes up until Java 11. Knowledge of streams and lambdas not necessary.
Recommended Follow-up
Sign up to The Java Specialists’ Newsletter for lots of tips on the latest Java developments: https://www.javaspecialists.eu/archive
Schedule
The timeframes are only estimates and may vary according to how the class is progressing
Section 1 - Introduction to Collections in Java (10 minutes)
- Computational Time and Space Complexity
- Arrays
Section 1 Quiz (5 minutes)
Section 2 – Lists (30 minutes)
- Lists
- ArrayList
- Iteration
- CopyOnWriteArrayList
- LinkedList
Section 2 Quiz (5 minutes)
Section 3 – Sorting (25 minutes)
- Sorting lists
Section 3 Quiz (5 minutes)
Section 4 – Sets (15 minutes)
- Sets
- TreeSet
- ConcurrentSkipListSet
- CopyOnWriteArraySet
Section 4 Quiz (5 minutes)
Section 5 – Hashing (15 minutes)
- Hashing
- HashSet
- ConcurrentHashMap.newKeySet()
Section 5 Quiz (5 minutes)
Section 6 – Maps (45 minutes)
- Maps
- HashMap
- ConcurrentHashMap
- TreeMap
- ConcurrentSkipListMap
- LinkedHashMap and LinkedHashSet
- Highly Specialized Collections: EnumSet, EnumMap, IdentityHashMap, Properties, WeakHashMap
Section 6 Quiz (5 minutes)
Section 7 - Queues and Deques (25 minutes)
- Queues and Deques
- ConcurrentLinkedQueue and ConcurrentLinkedDeque
- ArrayDeque
- BlockingQueues
- LinkedBlockingQueue and LinkedBlockingDeque
- ArrayBlockingQueue
- Highly specialized queues: DelayQueue, SynchronousQueue, LinkedTransferQueue
- PriorityQueue and PriorityBlockingQueue
Section 7 Quiz (5 minutes)
Section 8 - Collection Facades (15 minutes)
- java.util.Collections
- java.util.Arrays
Section 8 Quiz (5 minutes)
Section 9 – Wrap-up (15 minutes)
- Further questions
"I enjoyed the data structures course, appreciate it not being a rehash of the self study course :)"
"For me it was a very interesting revisit to data structures. It is very educational to follow along and hear your comments as you code. Interesting to learn about alternate syntaxes etc , not always obvious to me :-), but that's the objective of the webinars to show new or advanced ways of coding."
Your Instructor
Heinz Kabutz is the author of The Java Specialists’ Newsletter, a publication enjoyed by tens of thousands of Java experts in over 150 countries. He has been a Java Champion since 2005.
Course Curriculum
Courses Included with Purchase
