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What is JAVAJava is a general-purpose computer

programming language that is concurrent, class-based, object-oriented, and

specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write

once, run anywhere" (WORA)

HISTORY OF JAVA James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in

June 1991. The small team of sun engineers called Green Team.

James Gosling

The language was initially called Oak 

Later the project went by the name Green 

and was finally renamed Java

Duke, the Java mascot

Meet

Sun Microsystems released the first public implementation as Java 1.0 in 1995

On November 13, 2006, Sun released much of its Java virtual machine (JVM) as free and open-source

software, (FOSS)

On 2009-10, Oracle took over Sun Microsystems

The Battle you must know

In 2010 Oracle sues Google over 37 specific java API which was use in android

“Each package is like a bookshelf in the library, Each class is like a book on the shelf. Each method is like a how-to-do-it chapter in a book. Go to the right shelf, select the right book, and open it to the chapter that covers the work you need.” _ William Alsup (judge)

Federal Circuit Court of Appeals == HORRIFIC RULING

As of now, only Java 8 is supported ("publicly").

Major release versions of Java, along with their release dates:

•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)

Why ?

There were five primary goals in the creation of the Java language

1.It must be "simple, object-oriented, and familiar".2.It must be "robust and secure".3.It must be "architecture-neutral and portable".4.It must execute with "high performance".5.It must be "interpreted, threaded, and dynamic“

1. Simple

2. Object-Oriented

3. Platform independent

4. Secured

5. Robust

6. Architecture neutral

7. Portable

8. Dynamic

9. Interpreted

10.High Performance

11.Multithreaded

12.Distributed

Features Of Java

Feb 2016 Feb 2015 Programming Language Ratings Change

1 2 Java 21.145% +5.80%

2 1 C 15.594% -0.89%

3 3 C++ 6.907% +0.29%

4 5 C# 4.400% -1.34%

5 8 Python 4.180% +1.30%

6 7 PHP 2.770% -0.40%

7 9 Visual Basic .NET 2.454% +0.43%

8 12 Perl 2.251% +0.86%

9 6 JavaScript 2.201% -1.31%

10 11 Delphi/Object Pascal 2.163% +0.59%

Top programing languages

Source -http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html

11 20 Ruby 2.053% +1.18%

12 10 Visual Basic 1.855% +0.14%

13 26 Assembly language 1.828% +1.08%

14 4 Objective-C 1.403% -4.62%

15 30 D 1.391% +0.77%

16 27 Swift 1.375% +0.65%

17 18 R 1.192% +0.23%

18 17 MATLAB 1.091% +0.06%

19 13 PL/SQL 1.062% -0.20%

20 33 Groovy 1.012% +0.51%

JVM + Library Classes

JDK

JRE+ toolkit

Java Architecture

Source Code

Java compiler JVM(Java Virtual Machine)

Operating SystemByte code

Compilation and interpretation in Java

The ApproachJava use Object-Oriented Approach

• Object • Class• Inheritance• Polymorphism• Encapsulation • …….etc