Intro to Java Technology
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This document provides an introduction to Java technology, including its history and development. It discusses: - Java was created in 1995 by James Gosling at Sun Microsystems and was influenced by C and C++. - Java has evolved over time, with major releases in 1998 (Java 2) and 2006 (Java SE, EE, ME). - Java remains very popular for enterprise applications and mobile development via Android. - It demonstrates Java tools like the JDK, NetBeans IDE, and Notepad++ text editor for compiling and running basic Java programs.
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Java is an object-oriented programming language originally developed by James Gosling at Sun Microsystems in 1995. It is used to create a wide variety of applications including web applications, mobile applications, desktop applications, and enterprise applications. Java code is platform independent, meaning it can run on any system with a Java interpreter, allowing software to be written once and run anywhere.
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- Java is an object-oriented programming language and platform that is widely used to create desktop, web, enterprise, mobile, and other applications.
- Java applications can run on many platforms due to its platform independence. It uses a virtual machine to execute bytecode, allowing code to run on different operating systems.
- The Java language was originally developed by James Gosling and Sun Microsystems in the early 1990s and was released in 1995. It has since evolved through many versions.
- Common features of
Java
This document provides an overview of the Java programming language by explaining what Java is, where it is used, the types of applications that can be created in Java, and the history and features of Java. Some key points:
- Java is an object-oriented programming language and platform that is widely used to create desktop applications, web applications, enterprise applications, mobile applications, and more.
- Major applications of Java include desktop software, web apps, banking systems, Android apps, and games. It can be used to create standalone apps, web apps, enterprise apps, and mobile apps.
- Java was originally developed in the early 1990s by James Gosling and his team at Sun Microsystems and was
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Intro to Java Technology
- 1. Java Technology Jussi Pohjolainen Tampere University of Applied Sciences
- 3. Introduction to Java • Java is a programming language developed by James Gosling at Sun Microsystems • Released in 1995 • Syntax derived from C and C++
- 4. 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)
- 5. 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/paperin fo/tpci/index.html
- 6. Java on Desktop: SwingSet demo
- 7. Java on Mobile: Opera Mini
- 8. Java on Server: Etuovi.com
- 9. 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!
- 12. JAVA TOOLS
- 13. 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!
- 14. 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
- 15. NetBeans on Mac OS X
- 16. 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
- 17. Basic JDK Commands (Command Prompt) • javac – Java Compiler – javac MyProgram.java • java – Running Java Apps – java MyProgram • That's it!
- 19. 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
- 20. Exercise • Download and configure Notepad++ • Download Java SE 6 • Read ... – http://java.sun.com/docs/books/tutorial/getStart ed/cupojava/win32.html • ... and Compile and run "HelloWorld"- application