World Library  
Flag as Inappropriate
Email this Article

Java applet

Article Id: WHEBN0000013593
Reproduction Date:

Title: Java applet  
Author: World Heritage Encyclopedia
Language: English
Subject: Java (programming language), Java/Selected article, Applet, Java Web Start, PJIRC
Collection: Java (Programming Language), Java Platform, Java Programming Language
Publisher: World Heritage Encyclopedia

Java applet

A Java applet that was created as supplementary demonstration material for a scientific publication.[1]
A Java applet that uses 3D hardware acceleration to visualize 3D files in .pdb format downloaded from a server.[2]
Using applet for nontrivial animation illustrating biophysical topic (randomly moving ions pass through voltage gates)[3]
Using a Java applet for computation - intensive visualization of the Mandelbrot set[4]
Sufficient running speed is also utilized in applets for playing nontrivial computer games like chess[5]
NASA World Wind (open source) is a second generation applet[6] that makes heavy use of OpenGL and on-demand data downloading to provide a detailed 3D map of the world.
Web access to the server console at the hardware level with the help of a Java applet
Demonstration of image processing using two dimensional Fourier transform[7]

A Java applet is a small application which is written in Java and delivered to users in the form of bytecode. The user launches the Java applet from a web page, and the applet is then executed within a Java Virtual Machine (JVM) in a process separate from the web browser itself. A Java applet can appear in a frame of the web page, a new application window, Sun's AppletViewer, or a stand-alone tool for testing applets. Java applets were introduced in the first version of the Java language, which was released in 1995.

Java applets can be written in any programming language that compiles Java bytecode. They are usually written in Java, but other languages such as Jython,[8] JRuby,[9] Pascal,[10] Scala, or Eiffel (via SmartEiffel)[11] may be used as well.

Java applets run at very fast speeds and are comparable to other compiled languages such as C++, though the latter have a slight advantage. Until 2011, Java applets had run many times faster than JavaScript.[12] Unlike JavaScript, Java applets had access to 3D hardware acceleration, making them well-suited for non-trivial, computation-intensive visualizations. As browsers have gained support for hardware-accelerated graphics thanks to the canvas technology (or specifically WebGL in the case of 3D graphics), as well as just in time compiled JavaScript, the speed difference has become less noticeable.

Since Java's bytecode is cross-platform (or platform independent), Java applets can be executed by browsers (or other clients) for many platforms, including Microsoft Windows, FreeBSD, Unix, OS X and Linux. It is also trivial to run a Java applet as an application with very little extra code so that it can be run directly from the integrated development environment (IDE).


Applets are used to provide interactive features to web applications that cannot be provided by HTML alone. They can capture mouse input and also have controls like buttons or check boxes. In response to user actions, an applet can change the provided graphic content. This makes applets well-suited for demonstration, visualization, and teaching. There are online applet collections for studying various subjects, from physics[13] to heart physiology.[3]

An applet can also be a text area only; providing, for instance, a

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.