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1 G54PRG Programming Lecture 1 Amadeo Ascó Adam Moore G54PRG Programming Lecture 1 Amadeo Ascó 3 Java Programming Language.

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Presentation on theme: "1 G54PRG Programming Lecture 1 Amadeo Ascó Adam Moore G54PRG Programming Lecture 1 Amadeo Ascó 3 Java Programming Language."— Presentation transcript:

1 1 G54PRG Programming Lecture 1 Amadeo Ascó Adam Moore G54PRG Programming Lecture 1 Amadeo Ascó 3 Java Programming Language

2 2 Amadeo Ascó, Adam Moore Previously What is a programming language? – Set of grammatical rules for instructing a computer to perform specific tasks Languages by implementation – Machine language; Assembly language – Compiled languages; C, C++ – Interpreted languages; Java Language by paradigm Simple initial design – Divide project into smaller and simpler subprojects – Pseudocode

3 3 Amadeo Ascó, Adam Moore Overview Whats Java? Some history Characteristics Components Type of programs Development

4 4 Amadeo Ascó, Adam Moore Whats Java? Java is a programming language Created by Sun Microsystems Often used for web programming – Initially marketed as a web development system – Java is not only for web programming General purpose programming language Very similar to C++ – simplified!

5 5 Amadeo Ascó, Adam Moore What Else? NOT JAVASCRIPT!!!!

6 6 Amadeo Ascó, Adam Moore Some history James Gosling - Sun – Started 1991, Launched 1995 – "write once, run anywhere" WORA There were five primary goals : – It should be "simple, object oriented, and familiar". – It should be "robust and secure". – It should be "architecture neutral and portable". – It should execute with "high performance". – It should be "interpreted, threaded, and dynamic". NOT Licensed to Microsoft - $20M

7 7 Amadeo Ascó, Adam Moore Current 'Flavours' Java SE – Standard Edition Java EE – Enterprise Edition – Servlets Java ME – Micro Edition – Optimised for mobile devices

8 8 Amadeo Ascó, Adam Moore Characteristics Object Oriented Concurrent Interpreted Modular – There's a library for (nearly) everything! Internationalization - utf8 native Memory Management Error Handling

9 9 Amadeo Ascó, Adam Moore Components Hardware Operating System Virtual Machine Byte Code

10 10 Amadeo Ascó, Adam Moore Development / Distribution JDK – Development Toolkit – Compiler – Header Files JRE – Runtime Environment – Just what's needed to execute bytecode

11 11 Amadeo Ascó, Adam Moore Type of programs Applications – Has an entry point; static main method – Runable in a computer with JVM JVM OS Application Storage Library (y)

12 12 Amadeo Ascó, Adam Moore Type of programs Applets – GUI applications – Applet is a program written in the Java that can be included in an HTML page Browser Library (y) OS Applet Web Server Storage Library (y)

13 13 Amadeo Ascó, Adam Moore Servlets – Applications that run on the server side, so has an entry point – Normally used to extend functionality of a Web Type of programs Servlet Web Server Storage JVM OS Library

14 14 Amadeo Ascó, Adam Moore Libraries – Re-usable code – Cannot be run by itself; doesnt have an entry point Type of programs JVM OS Application Storage Library (y)

15 15 Amadeo Ascó, Adam Moore Development Java Development Kit (JDK) /index.html Eclipse Development Environment Penumbra is in Documentation for Java libraries Tutorial

16 16 Amadeo Ascó, Adam Moore Eclipse Rapid Application Development Very Powerful Most commonly used RAD today For (just about) all Languages Can be very complex So - we are using Penumbra – Special Educational Edition


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