E

ellipsis

Three dots (...). In a GUI component, an ellipsis indicates that activating the component will cause the display of a new window or dialog.

empty string

An instance of the String class with zero characters.

event-driven program

A program that acts mainly in response to user input.

events

The mechanism by which components inform listeners that they have been activated.

exception

An object that is thrown to indicate an unusual or error state. The throwing of an exception diverts the normal flow of program control.