Java Overview

Java is a high-level, platform-independent programming language developed by James Gosling and his team at Sun Microsystems in 1991. It was later acquired by Oracle Corporation, which currently maintains it.

Java follows the Write Once, Run Anywhere (WORA) principle, allowing programs to run on any system equipped with a Java Virtual Machine (JVM).

Key Features of Java

• Object-Oriented Programming (OOP): Follows OOP principles like inheritance, encapsulation, polymorphism, and abstraction.
• Statically Typed: Variable types are explicitly declared and checked at compile time.
• Imperative Programming Paradigm: Focuses on describing how a program operates, using statements that change a program's state.
• Strong Type Checking: Prevents data-type errors during compilation.
• Robust and Secure: Features like garbage collection, exception handling, and runtime checking enhance reliability and security.
• Dynamic Memory Allocation: Allocates memory dynamically during runtime, improving efficiency.
• Highly Portable: Thanks to the JVM, Java programs can run on any platform without modification.
• Multithreading Support: Enables concurrent execution of two or more threads for efficient performance.
• Faster Execution: The combination of compilation (to bytecode) and interpretation by JVM enhances speed.
• Data Hiding & Abstraction: Supports encapsulation to protect data and abstraction to simplify complexity.

Java Development Kit (JDK)

The Java Development Kit (JDK) is a complete software development package provided by Oracle for building Java applications.

If you want to develop and execute Java programs, you’ll need the JDK. It includes: