J

JAR

A popular compression format. Also a name of a compression utility.

Java

Sun's popular programming language. Java is a platform-independent (at least in theory), crash-protected, object-oriented language that can be used to write applets that run in a browser, servlets that run server-side, or independent programs. Java's syntax is similar to that of C++.

Java class files

The file or set of files that contain the code for a Java applet.

Java Servlet

Servlets are programs written in Java that run on a Web server and can produce dynamic pages. Also see JSP.

Java Virtual Machine (JVM, Java Runtime Environment)

A set of programs that allow for Java applets to be run on a particular computer system.

JavaScript

Simple, client-side programming language created by Sun and Netscape. JavaScript can be embedded in HTML pages to create interactive effects and do tasks like validate form data. JavaScript is a separate language from Java. All popular modern browsers support JavaScript. A few hosts support server-side JavaScript.

JDBC

Java Database Connectivity - a mechanism allowing Java applets to access different databases.

JPEG

(Joint Photographic Experts Group) A image compression format designed for the Internet. Uses lossy compression, meaning that the quality of the image can be lowered.

JScript

Microsoft's implementation of ECMAScript standard based on JavaScript. Limited, object-based, interpreted scripting language. Here is the official JScript site. JScript is comparable to VBScript.

JSP

Java Server Pages. Extension of Java Servlet technology for combining Java server-side programs and HTML. JSP pages have an extension .jsp.
Java
Invented at Sun Computers, Java is a programming language like C++. The advantage of using Java is that almost all computer systems, and most browsers, have the capability of running Java applications, or applets. Java programs are automatically downloaded and executed on the client side by the web browser. You can do lots of things in Java that you can't do in HTML. Not to be confused with JavaScript.
Java Applet
Java applets are small Java programs that get downloaded to your computer and then run from a web browser when a web page that uses Java is loaded.
JavaScript

JPEG
The acronym for Joint Photographic Experts Group, JPEG is an image compression format used to transfer color photographs and images over computer networks. Along with GIF, it's one of the most common ways photos are moved over the Web.
Links
These are the hypertext connections between Web pages. This is a synonym for hotlinks or hyperlinks.
Live
When used in reference to a World Wide Web file, this term designates an object linked to another layer of information.

Java
A programming language developed by SUN. Mostly for programming web servers and web applets.

Java Applet
See Web Applet.

JavaScript
The most popular scripting language on the internet, developed by Netscape.
Learn more about JavaScript in our JavaScript tutorial.

JPEG (Joint Photographic Expert Group)
The organization that promotes the JPG and JPEG graphic formats for storing compressed images.

JPEG and JPG
Graphic formats for storing compressed images.

JScript
Microsoft's version of JavaScript.

JSP (Java Server Pages)
A Java based technology allowing the insertion of server executable scripts in web pages. Mostly used on Linux, Unix and Solaris platforms.


JPG of JPEG
In computing, JPEG (pronounced /ˈdʒeɪpɛɡ/, jay-peg) is a commonly used method of lossy compression for photographic images. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality.
note- every time you open and save a jpeg it compress a little more.

JPG or JPEG (Joint Photographic Experts Group)
The second Internet graphic standard. JPEGs allow for a greater depth of color than GIF images. They can contain millions of colors with smaller file sizes than other formats. JPEGs can be compressed using various quality settings. The higher the compression, the smaller the file, but the lower the resulting quality.
JSP
Java Server Pages (.jsp) make use of special code on UNIX web servers to create web pages. Generally used in large e-commerce websites.
LDAP (Lightweight Directory Access Protocol)
An open standard for programs to store and retrieve names, addresses, email, phone numbers, and other information from an online directory. LDAP is used to build online directories on intranet networks, as well as Internet-based online directories.