What's Next?

What's Next

You have mastered the core of Java. Here are natural next steps:

• Spring Boot — the dominant Java web framework. Build REST APIs, connect to databases, and deploy backend services.
• Android Development — Java (and Kotlin) is the language of Android apps.
• Design Patterns — Singleton, Factory, Observer, Strategy. Java's OOP model makes these patterns central to its culture.
• Concurrency — Java's thread model, synchronized, ExecutorService, and the java.util.concurrent package.
• Kotlin — a modern JVM language that runs alongside Java, with concise syntax and coroutines for async programming.

Resources

• Oracle Java Tutorials — the official, comprehensive Java tutorial.
• Effective Java by Joshua Bloch — the definitive book on writing good Java.
• Baeldung — practical Java guides for Spring, collections, concurrency, and more.
• LeetCode — practice data structures and algorithms in Java.