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Nitin Kushwaha

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Nitin Kushwaha

Nitin Kushwaha

09-Jul-2019

 Java

Java is a programming language.

  • It is a platform independent, highly secure, robust, flexible, portable, object-oriented programming language.
  • Program written in Java offer Portable in a network: - In Java, Source code compiled into byte code that can be run into any network.
  • Java is objected oriented: - An object is made up of attributes and code as a method.
  • Java is robust: - Java objects do not contain any reference of data.
  • Java is secure: - Java has not used a pointer (address of next field).
  • Developers can easily understand.

Edition of Java:- 

  • J2SE- Java Simple Edition.
  • J2EE-Enterprises Edition.
  • J2ME- Java Micro Edition.
  • J Fax- rich on the internet.

History of Java:-

  • It was created in 1995 by Green’s Teams. Leader of the green team is James Gossling.
  • James Gossling was also called a father of java.
     How to install java on Windows: 

Steps are:-

  • Go to "System Properties" (Can be found on Control Panel > System and Security > System > Advanced System Settings)
  •  Click on the "Environment variables" button under the "Advanced" tab
  •  Then, select the "Path" variable in System variables and click on the "Edit" button
  •  Click on the "New" button and add the path where Java is installed, followed by \bin. By default, Java is installed in C:\Program Files\Java\jdk-11.0.1 (If nothing else was specified when you installed it). In that case, You will have to add a new path with C:\Program Files\Java\jdk-11.0.1\bin
  • Then, click "OK", and save the settings
  • At last, open Command Prompt (cmd.exe) and type java -version to see if Java is running on your machine.

Java Syntax:-

Class name.java

Where .java is the extension.

E.g. 

Public class student

{

Public static void main (String args[])

{

System.out.println (“Hello India”);

}

}

Output:-

Hello India

Where Student is the class name.

Java Data Types:-

There are two parts of the data type are;

  •  The primitive Data type (non-user defined):- int, char, float, double, short, etc.
  •  Non-Primitive Data Type (user defined):- String, Arrays, Classes.
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