Used to specify a class that cannot be instantiated . Subclasses may inherit from an abstract class, that is, extend them. Also, modifies a method whose implementation you wish to defer to another class.
Abstract Windowing Toolkit ( AWT )
Package of graphical user interface classes implemented in native platform component versions. AWT classes allow for the creation of buttons , frames , event handlers, and text in application interfaces. AWT's popularity has ebbed significantly in favor of the newer , more portable and lightweight Swing.
API
Application programming interface. The specification that dictates how a programmer must write to access the state and behavior of objects and classes.
applet
A ( generally small) program written in Java that extends the java.applet.Applet class. By extending this class, the program becomes capable of executing in a Web browser or other device that supports applets in general. Applets helped create tremendous popularity for the Java programming language early in its life because they allow programs to be dynamically downloaded and securely executed. Applets can be viewed from the command line with appletviewer, a program of the standard SDK. Alternatively, applets can be viewed in a Web page by having the user download a plugin and referencing the applet with either the <object> or <applet> tags, both part of standard HTML. Microsoft's illegal incorporation of proprietary technology into its Java Virtual Machine seems to have had significant negative impact on the popularity of applets, as the necessary 5MB plugin download from Sun makes for a thicker client and additional user support.
argument
An argument is an item of data passed into a method. An argument may be an expression, a variable, or a literal.
array
An ordered set of data items, all of which must be of the same type. Each item in the array can be referenced by its integer position. The first element of a Java array is 0.
ASCII
Acronym for American Standard Code for Information Interchange. An ASCII code is the 7-bit numerical representation of a character, which can be understood by many different computing platforms.
