History and installation of Java

Hope all doing well!

Here I start with the concepts of Core Java which are helpful for the Selenium Automation.

What is Java?

    Java is a more powerful Programming language, a high level, robust, secured and object-oriented. It is markedly known for its powerful feature WORA (Write Once Run Any Where). Hence Java has its own Run Time Environment (JRE) it is widely notable as platform independent.

History of Java:

·         Originally developed by James Gosling at Sun Micro-systems (which is now a subsidiary of Oracle Corporation) and released in 1995.

·         JDK 1.0 released in January 23, 1996.

·         Java is initially named as OAK which is said to be the symbol of Strength.

·         JAVA is the name of an island in Indonesia where first coffee was produced (called java coffee).

Java Versions:

There are many java versions that have been released. Current stable release of Java is Java SE 8

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 March, 2014)

How to install Java?

First and foremost check whether java is installed in your system as follows:

Go to Command Prompt and type the command "java -version" will result the current version of java installed in your system.

If java is not installed download JDK and install it.

Java programs can be executed in multiple editors here I would like to pick Notepad and Eclipse IDE (Install Eclipse IDE here)

First Sample Java program: The following is the first sample java program just open Note pad and copy the following code:

Class First Program { 

    public static void main(String args[]){ 

     System.out.println("Hello World"); 

    } 

} 

Executing through Notepad editor:

Save this program as First_Program.java

How to compile?

javac is the command to compile. Go to Command prompt -> set the path where you have saved the Java Program ->Type the Command javac First_Program.java

How to run?

After compilation run the program: java First Program gives you the result in command prompt.

See you in Next Post with OOPs concepts :)

Cheers & Happy Learning,

Navatha Kannadi