Java Introduction

Java is a widely used programming language and software platform. 

Java Technology = Programming Language + Java Software platform 

  

Java Programming Language 

Java is a high-level programming language that has below characteristics: 

• Simple 
• Object oriented 
• Distributed 
• Multithreaded 
• Dynamic 
• Architecture neutral 
• Portable 
• High performance 
• Robust 
• Secure

Java Platform

A platform is the hardware or software environment in which a program runs.  

The Java platform is a software-only platform that runs on top of other hardware-based platforms.

The Java platform has two components:

• Java Virtual Machine (JVM)
• Java Application Programming Interface (API)

JVM is the base for the Java platform and is ported onto various hardware-based platforms.

Java API is a large collection of ready-made software components that provide many useful capabilities. It is grouped into libraries of related classes and interfaces; these libraries are known as packages.