Java Basics

What is java?

Java is a programming language and a platform. Java is a high level, robust, object-oriented and secure programming language. It is owned by Oracle.

Java is WRITE ONCE RUN ANYWHERE (WORA)

It is used for:

  • Mobile applications (specially Android apps)
  • Desktop applications
  • Web applications
  • Web servers and application servers
  • Games
  • Database connection

Why use java?

Java works on different platforms.

  • It is easy to learn and simple to use
  • Java is object oriented programming language
  • It is a platform independent
  • It is open-source and free
  • It is secure, fast and powerful

Platform Independent

What is JDK ?

The Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It is platform independent. It is a compiler.

JDK is convert to byte codes and class files. JDK is called Compile time running.

It has Compiler, Exception Handling and Garbage Collector.

what is JVM ?

JVM stands for Java Virtual Machine.

JVM is platform dependent as Operating System.

JVM is convert to Binary codes. JVM is called Run time Environment.

Open Source Code

  • Free Software
  • Can run on any system

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