Glossary - Index J
Java: Sun Microsystems' Java is a programming language for adding animation and other action to Web sites. The small applications (called applets) that Java creates can play back on any graphical system that's Web-ready, but your Web browser has to be Java-capable for you to see it. According to Sun's description, Java is a "simple, object-oriented, distributed, interpreted, robust, secure, architecture-neutral, portable, high-performance, multithreaded, dynamic, buzzword-compliant, general-purpose programming language."
Java Virtual Machine: The Java Virtual Machine (VM) is a program that interprets Java bytecodes into machine code. The VM is what makes Java portable--a vendor such as Microsoft or Sun writes a Java VM for their operating system, and any Java program can run on that VM.
JPG: Pronounced jay-peg, it is a graphics file format that can be compressed to save file size. Because they can be compressed, they are one of the most popular format of pictures found on websites and can be downloaded quickly at their compressed size, but can also be very high quality and large, when needed.
Jumper: An on/off switch used to alter hardware configurations. A jumper is made of wires and a small metal piece that can connect the wires to turn the jumper on. Jumpers are found on devices such as CD-ROM interface boards, bus expansion boards, controller boards, input/output cards, sound cards, graphics cards, modem cards, and motherboards.