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Java Tutorials

Article By The Techie King

Java is a programming language and computing platform first released by Sun Microsystems in 1995. It has evolved from humble beginnings to power a large share of today’s digital world, by providing the reliable platform upon which many services and applications are built. New, innovative products and digital services designed for the future continue to rely on Java, as well. While most modern Java applications combine the Java runtime and application together, there are still many applications and even some websites that will not function unless you have a desktop Java installed. Java.com, this website, is intended for consumers who may still require Java for their desktop applications – specifically applications targeting Java 8. Developers as well as users that would like to learn Java programming should visit the dev.java website instead and business users should visit oracle.com/java for more information.

In the Java programming language, all source code is first written in plain text files ending with the .java extension. Those source files are then compiled into .class files by the javac compiler. A .class file does not contain code that is native to your processor; it instead contains bytecodes — the machine language of the Java Virtual Machine1 (Java VM). The java launcher tool then runs your application with an instance of the Java Virtual Machine.

Is Java free to download?

Yes, Java is free to download for personal use.

Java is also free for development: developers can find all the development kits and other useful tools at https://www.oracle.com/javadownload/.

Java is used for

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

Advantages of Java Programming

Object Oriented In Java, everything is an Object. Java can be easily extended since it is based on the Object model.

Platform Independent - Unlike many other programming languages including C and C++, when Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code. This byte code is distributed over the web and interpreted by the Virtual Machine (JVM) on whichever platform it is being run on.

Simple - Java is designed to be easy to learn. If you understand the basic concept of OOP Java, it would be easy to master.

Secure - With Java's secure feature it enables to develop virus-free, tamper-free systems. Authentication techniques are based on public-key encryption.

Robust - Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking.

Portable - Being architecture-neutral and having no implementation dependent aspects of the specification makes Java portable

Java Versions

Here are a brief history of all the Java versions with its release date.

Java Versions	Release Date
JDK Alpha and Beta	1995
JDK 1.0	23rd Jan 1996
JDK 1.1	19th Feb 1997
J2SE 1.2	8th Dec 1998
J2SE 1.3	8th May 2000
J2SE 1.4	6th Feb 2002
J2SE 5.0	30th Sep 2004
Java SE 6	11th Dec 2006
Java SE 7	28th July 2011
Java SE 8	18th Mar 2014
Java SE 9	21st Sep 2017
Java SE 10	20th Mar 2018
JAVA SE 11	25th Sep 2018
JAVA SE 12	19th Mar 2019
JAVA SE 13	17th Sep 2019
JAVA SE 14	17th Mar 2020
JAVA SE 15	15th Sep 2020 (latest Java Version)

Components Of Java Programming Language

A Java Programmer writes a program in a human-readable language called Source Code. Therefore, the CPU or Chips never understand the source code written in any programming language. These computers or chips understand only one thing, which is called machine language or code. These machine codes run at the CPU level. Therefore, it would be different machine codes for other models of CPU. However, you need to worry about the machine code, as programming is all about the source code. The machine understands this source code and translates them into machine understandable code, which is an executable code.