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What is Java?

April 5, 2026

What is Java?

Java is a high-level, object-oriented programming language designed for platform independence. Developed by Sun Microsystems in 1995, it follows "Write Once, Run Anywhere" (WORA) principle through JVM.

First Java Program

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

Key Points

  • Java code compiles to bytecode executed by JVM.
  • public static void main(String[] args) is program entry point.
  • System.out.println() prints to console.
  • Case-sensitive language with semicolon termination.
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