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Glossary J...


JAVA Java technology is a portfolio of products originally developed by Sun Microsystems that are based on the power of networks and the idea that the same software should run on many different kinds of systems and devices.
JAVABEANS JavaBeans technology is the component architecture for the Java 2 Platform, Standard Edition (J2SE). Components (JavaBeans) are reusable software programs that you can develop and assemble easily to create sophisticated applications. JavaBeans technology is based on the JavaBeans specification
JAVASCRIPT A scripting language from Netscape that is only marginally related to Java. Java and JavaScript are not the same thing. JavaScript was designed to resemble Java, which in turn looks a lot like C and C++. The difference is that Java was built as a general-purpose object language, while JavaScript is intended to provide a quicker and simpler language for enhancing Web pages and servers. JavaScript is embedded as a small program in a web page that is interpreted and executed by the Web client. The scriptor controls the time and nature of the execution, and JavaScript functions can be called from within a Web document, often executed by mouse functions, buttons, or other actions from the user. JavaScript can be used to fully control Netscape and Microsoft Web browsers, including all the familiar browser attributes.
JAY MINER Often referred to as the father of the Amiga, he was one of the group of three engineers responsible for the original design for the Amiga. Before Amiga he designed some of the first digital voltmeters & calculators, and the VCS games console for Atari. In later years he worked for Ventritex where he designed the chip that is central to the Ventritex implantable cardiac defibrillator that can be programmed externally. With his Cocker Spaniel "Mitchy" he was a regular at any Amiga gathering and always ready to talk about his brainchild. Unfortunately in his later years he experienced serious kidney problems and died on June 20 1994 at age 62.
JFF (pronounced "J-F-F") Acronym for JPEG File Format, and is one of the many file suffixes used for files stored in JPEG format.
JFIF (pronounced "J-F-I-F") Acronym for JPEG Format Image File, and is one of the many file suffixes used for files stored in JPEG format.
JOINT PHOTOGRAPHIC EXPERT GROUP (acronym JPEG) Normally refers to the standards that have been defined by this group for inter-platform image compression. The standards applies to single frames only (not animations or moving pictures which use MPEG instead), and the amount of image loss varies, depending on the degree of compression used. At maximum compression rates an image can be reduced to as little as 1/40 of the original with minimal loss. Images in this format generally have a suffix of ".jff", ".jfif", ".jpg" or ".jpeg".
PC: Many programs written for MS-DOS, Windows 95 and Windows 98 only recognise files with the ".jpg" extension and refuse to read files with any of the other extensions, so simply change the extension to ".jpg".
JOYPAD A device to control the movement of images on the screen using a set of buttons, similar to using the cursor keys, rather than using a joystick. Some even use infared control but are generally less effective than cable types used by most of the latest games machines, as well as the CD-32.
JOYSTICK A device to control the movement of images on the screen. Adigit joystick uses four switches arranged in a cross formation and typically has 4 or 8 available positions (up, down, left, right and optionally the diagonals between them) with a spring-loaded hand grip. An analog joystick uses four potentiometers (variable resistors) in a similar pattern giving an almost infinite number of positions. Both usually have one or more "Fire" buttons on the top, side or front of the joystick and/or the base. Some of the latest models have resistance and feed back servos built in to give a more realistic feel.
JPEG (pronounced "J-peg") Acronym for Joint Photographic Expert Group, and normally used instead of the rather verbose title it represents. It is also used as one of the many file suffixes for files stored in JPEG format.
JPG (pronounced "J-P-G") An abbreviation for JPEG, that is one of the many file suffixes used for files stored in JPEG format.
JUSTIFICATION The way text is formatted on a line. It can either be "centred", "flush", "left" or "right" justified.

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