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Java

A statically-typed, object-oriented language behind much of the enterprise and Android world — from the JVM's execution model through modern streams and real automated testing. Each course below is independent -- start with whichever one fits what you want to learn.

Java Programming Foundations

The JVM execution model, core language syntax, object-oriented design, exceptions, generics, modern streams, and real automated testing with JUnit.

14 lessons8hintermediate
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  1. 1. The JVM, the JDK, and How a Java Program Runs
  2. 2. Variables, Primitive Types, and Reference Types
  3. 3. Operators, Expressions, and Working with Strings
  4. 4. Control Flow: Conditions, Loops, and Modern Switch
  5. 5. Methods: Parameters, Return Values, and Overloading
  6. 6. Arrays: Fixed-Size, Typed, and Zero-Indexed
  7. 7. Collections: List, Set, and Map
  8. 8. Classes, Objects, Constructors, and Encapsulation
  9. 9. Inheritance vs. Composition, Packages, and Access Control
  10. 10. Interfaces, Abstract Classes, and Polymorphism
  11. 11. Exceptions: Checked, Unchecked, and Handling Them Well
  12. 12. Generics, Equality, hashCode, and Immutability
  13. 13. Lambdas and the Stream API
  14. 14. Resource Safety, Unit Testing, and Maintainable Project Structure