iwantcoding.com
🔥 Daily 👥 Rooms 🏆 Top Log in Sign up
« Previous

Java HOME

Welcome to the iwantcoding.com Java Tutorial. Java is the workhorse of enterprise software: statically typed, object-oriented, GC-managed, and battle-tested across decades of production code. Java compiles to bytecode and runs on the JVM — the same code, the same way, everywhere.

What this tutorial covers

ChapterYou will learn
Java BasicsSyntax, variables, data types, operators, strings, math, control flow, loops, arrays, methods.
OOPClasses, constructors, access modifiers, inheritance, polymorphism, abstracts, interfaces, enums, records, generics.
Collections & StreamsList / Map / Set, the Streams API, Optional, lambdas, date / time.
Practical JavaExceptions, try-with-resources, NIO files, threads, JDBC, Maven / Gradle, JUnit, Spring Boot intro.
ExamplesCheatsheet, runnable snippets, quiz, exercises, bootcamp, certificate.

Who this is for

  • Enterprise / backend devs building Spring services, Android apps, or big-data pipelines.
  • CS students — Java is the lingua franca of most degree programmes.
  • Kotlin / Scala folks who want to read the libraries they consume.
How to use this tutorial: read the chapter, run the example with Try it Yourself », do the exercise, then take the quiz at the bottom. Hit Mark complete when you're done — the sidebar will track your progress.

Example

Example
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, Java");
    }
}
Try it Yourself »

Discussion

Loading…

« Previous