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Java

Java is an object-oriented programming language used for enterprise applications, Android development, backend systems, and large-scale services.

What Is Java​

Java code runs on the Java Virtual Machine, which helps the same program run across different operating systems.

It has a mature ecosystem, strong tooling, and many frameworks.

How To Use Java​

Install a JDK, write .java files, compile with javac, and run with java.

Most real projects use build tools such as Maven or Gradle.

Basic Example​

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

Common Concepts​

  • Classes define objects and behavior.
  • Interfaces define contracts.
  • The JVM runs compiled bytecode.
  • Packages organize code.

What To Learn Next​

Learn classes, collections, exceptions, generics, streams, Maven or Gradle, and frameworks such as Spring Boot.