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Java Fundamentals
Beginner Programming Languages

Java Fundamentals

Build a solid foundation in Java, the world's most widely used enterprise language. OOP, collections, streams, and design patterns.

5 modules 20 lessons 8 h 1004 questions
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Course content

1 Java Fundamentals 4 lessons · 20 min
1 Variables, Types & Operators 4:58 2 Control Flow & Methods 4:59 3 Arrays, Methods & Varargs 4:27 4 Strings & Exception Handling 5:32
Practice · 0 of 206 questions Practice →
2 OOP & Design Patterns 4 lessons · 19 min
5 Classes, Objects & Constructors 5:16 6 Inheritance & Polymorphism 4:31 7 Interfaces & SOLID 4:40 8 Design Patterns 4:26
Practice · 0 of 185 questions Practice →
3 Collections & Generics 4 lessons · 18 min
9 ArrayList & the List Interface 4:39 10 HashMap & HashSet 4:26 11 Generics 4:33 12 Comparable, Comparator & Collections 4:22
Practice · 0 of 208 questions Practice →
4 Streams & Functional 4 lessons · 19 min
13 Lambdas & Functional Interfaces 4:49 14 Stream API 4:40 15 Optional & Advanced Streams 4:55 16 Parallel Streams & Collectors Deep Dive 4:47
Practice · 0 of 206 questions Practice →
5 Concurrency & JVM 4 lessons · 19 min
17 Threads & Runnable 4:30 18 Synchronization & Locks 4:44 19 ExecutorService & CompletableFuture 4:47 20 Modern Java & JVM Internals 5:27
Practice · 0 of 199 questions Practice →

Tips

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Collections Comparable vs Comparator Natural order vs custom order OOP Records with Custom Accessors and Compact Constructor Customize record behavior Generics Type Erasure and Its Implications What generics look like at runtime JVM String Methods in Modern Java Useful String additions since Java 11