Learn Java with uByte

Write your first Java program, understand the class structure, and learn how Java compiles and runs.

Explore Java's primitive types, String, type casting, var keyword, and constants with final.

Master System.out.printf, String.format, StringBuilder, and text blocks in Java.

Master if/else, switch, and ternary operators to make decisions in your Java code.

Master for, while, and for-each loops to repeat code and iterate over collections.

Work with fixed-size arrays and dynamic ArrayList collections in Java.

Store and look up key-value pairs with HashMap and the Map interface.

Define and call methods; pass arguments and return values.

Understand references, object identity, and how Java passes objects by reference value.

Define classes, create objects, and use constructors and fields.

Add behavior to classes with instance methods and overload methods by signature.

Define contracts with interfaces and share code with abstract classes.

Handle errors with try-catch, throw exceptions, and use finally.

Organize code into packages and import classes from other packages.

Run code in parallel with Thread and Runnable; basics of synchronization.

Write and run unit tests with JUnit 5 (Jupiter).

Make HTTP GET and POST requests using java.net.http.HttpClient (Java 11+).

Parse and generate JSON using simple string handling or libraries like Gson.

Use the Stream API and lambda expressions for functional-style operations on collections.