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J2ME
Java 2 Platform, Micro Edition (J2ME): The edition of the Java platform that is targeted at small, standalone or connectable consumer and embedded devices. The J2ME technology consists of a virtual machine and a set of APIs suitable for tailored runtime environments for these devices. The J2ME technology has two primary kinds of components - configurations and profiles.

Java
Industry standard object-oriented language and virtual machine, invented by Sun Microsystems and formally released in 1996. Java is an ideal language for network applications and applets. Sun's Java specifications include many Java APIs and platforms, including the JavaPhone API and PersonalJava platform, which are included in Symbian OS.

JavaPhone
A Java API specification controlling contacts, power management, call control, and phonebook management, intended specifically for the programmability requirements of mobile phones.

JTAPI
The Java Telephony API is an extensible API that offers an interface to all call control services (from those needed in a consumer device up to those of call centers). JTAPI is part of the JavaPhone API.

justification
The processes of spreading out the text on a line so that it is evenly distributed between the left and right margins. Also called full justification. Symbian OS supports word and character justification.
See also: word justification, character justification

just-in-time (JIT)
Just-in-time debugging is used to attach a debugger to a process at the point at which it is about to terminate.

JVM
Java Virtual Machine.