Java Technology Jussi Pohjolainen Tampere University of Applied Sciences

INTRODUCTION TO JAVA TECHNOLOGY

Introduction to Java Java is a programming language developed by James Gosling at Sun Microsystems Released in 1995 Syntax derived from C and C++

Java is a programming language developed by James Gosling at Sun Microsystems

Released in 1995

Syntax derived from C and C++

History Java 1.0 in 1995 Initial Success: Write Once Run Anywhere (WORA) Web Browsers incorporated the ability to run small Java – programs called Applets Java 2 was introduced in 1998, divided into three categories: Java2 Enterprise Edition (J2EE) Java2 Standard Edition (J2SE) Java2 Micro Edition (J2ME)

Java 1.0 in 1995

Initial Success:

Write Once Run Anywhere (WORA)

Web Browsers incorporated the ability to run small Java – programs called Applets

Java 2 was introduced in 1998, divided into three categories:

Java2 Enterprise Edition (J2EE)

Java2 Standard Edition (J2SE)

Java2 Micro Edition (J2ME)

Today In 2006 Sun renamed Java 2 versions Java EE Java SE Java ME Java versioning: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 and 1.6 (which is the current) Most popular programming language! http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html

In 2006 Sun renamed Java 2 versions

Java EE

Java SE

Java ME

Java versioning: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 and 1.6 (which is the current)

Most popular programming language!

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

Java on Desktop: SwingSet demo

Java on Mobile: Opera Mini

Java on Server: Etuovi.com

Java's Future? Very few Java desktop apps Sluggish performance? Why use Java when you have Qt? Popular on the enterprise and mobile side Mobile programming is under heavy turbulence at the moment: Nokia's Qt (C++) Apple's iPhone (Objective-C) Google's Android (Java) Sun Microsystem's financial trouble, Oracle bought Sun in April 2009!

Very few Java desktop apps

Sluggish performance?

Why use Java when you have Qt?

Popular on the enterprise and mobile side

Mobile programming is under heavy turbulence at the moment:

Nokia's Qt (C++)

Apple's iPhone (Objective-C)

Google's Android (Java)

Sun Microsystem's financial trouble, Oracle bought Sun in April 2009!

Compiling Java Apps http://java.sun.com/docs/books/tutorial/getStarted/intro/definition.html

Compiling Qt Apps http://www.symbianresources.com/tutorials/qt/01-QtIntroduction.pdf

JAVA TOOLS

Java Tools Three platforms: Java SE, Java ME, Java EE Java SE is used for desktop apps: Java SE Runtime Environment (JRE) For running Java apps Java SE Development Kit (JDK) For developing and running Java Apps Includes JRE!

Three platforms: Java SE, Java ME, Java EE

Java SE is used for desktop apps:

Java SE Runtime Environment (JRE)

For running Java apps

Java SE Development Kit (JDK)

For developing and running Java Apps

Includes JRE!

NetBeans Bundle The JDK comes with only the necessary tools to compile and run apps The JDK with NetBeans bundle is a IDE (Integrated Development Environment) that has all the tools to create Java SE apps

The JDK comes with only the necessary tools to compile and run apps

The JDK with NetBeans bundle is a IDE (Integrated Development Environment) that has all the tools to create Java SE apps

NetBeans on Mac OS X

Using Text Editor and JDK NetBeans is very powerful tool for creating Java Apps If you are about to start learning programming, I do not recommend NetBeans, use plain text editor and JDK instead! NetBeans does a lot work in the background NetBeans can be sluggish on older computers NetBeans can be confusing for junior programmers

NetBeans is very powerful tool for creating Java Apps

If you are about to start learning programming, I do not recommend NetBeans, use plain text editor and JDK instead!

NetBeans does a lot work in the background

NetBeans can be sluggish on older computers

NetBeans can be confusing for junior programmers

Basic JDK Commands (Command Prompt) javac – Java Compiler javac MyProgram.java java – Running Java Apps java MyProgram That's it!

javac – Java Compiler

javac MyProgram.java

java – Running Java Apps

java MyProgram

That's it!

NotePad++ Free text editor indented for programming (Windows) Change settings / preferences New Document: Format: Unix / Windows Depending on your configuration New Document: Encoding: ISO-8859-1 New Document: Default Language: Java Document: Tab Size 4, [x] Replace by Space

Free text editor indented for programming (Windows)

Change settings / preferences

New Document: Format: Unix / Windows

Depending on your configuration

New Document: Encoding: ISO-8859-1

New Document: Default Language: Java

Document: Tab Size 4, [x] Replace by Space

Exercise Download and configure Notepad++ Download Java SE 6 Read ... http://java.sun.com/docs/books/tutorial/getStarted/cupojava/win32.html ... and Compile and run "HelloWorld"-application

Download and configure Notepad++

Download Java SE 6

Read ...

http://java.sun.com/docs/books/tutorial/getStarted/cupojava/win32.html

... and Compile and run "HelloWorld"-application