Java Introduction

James Gosling, Mike Sheridan, and Patrick Noughton are the actual developers of Java language project in 1991. Java language was initially called Oak and was later renamed Java, from Java coffee. Sun Microsystems released the first public implementation as java 1.0 in 1995.

Java versions:

• JDK 1.0 (January 21, 1996)
• JDK 1.1 (February 19, 1997)
• J2SE 1.2 (December 8, 1998)
• J2SE 1.3 (May 8, 2000)
• J2SE 1.4 (February 6, 2002)
• J2SE 5.0 (September 30, 2004)
• Java SE 6 (December 11, 2006)
• Java SE 7 (July 28, 2011)
• Java SE 8 (March 18, 2014)

Java features:

1. Java is platform independent
2. Java language is easy to learn
3. Java is Object oriented programming language
4. Java can be used to build heavy enterprise applications
5. Java is open source software.
6. With java you can write secure and robust applications
7. Architecture neutral

Advantage of Java:

• Get started quickly
• Write less code
• Write better code
• Develop programs more quickly
• Avoid platform dependencies
• Write once, run anywhere
• Distribute software more easily

Basic questions:

Ques. What is Java?

Ans. Java is "Object oriented" programming language using which you can develop applications.

Ques. What types of program we can build using java?

Ans. 

1. We can create website like facebook, gmail.com
2. We can create standalone application like notepad, microsoft word, paint.
3. We can create Ecommerce application like flipkart, amazon, paytm etc.
4. We can create Banking application like HDFC payment, SBI payment
5. We can create mobile application

Ques. Why Java is popular?

Ans.

1. Platform independent
2. Easy to learn a simple to understand
3. Secured and robust
4. Open source

Ques. What is meaning of  object oriented language?

Ans. Any language which supports 6 features: Class, Object, Encapsulation, Abstraction, Inheritance and Polymorphism.