abstract concept from the Java knowledge base

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abstract

subject fact

abstract can modify method, class, interface added by: JK, source: Java in a Nutshell, 2001-10-19 11:35:56.0
has definition A Java programming language keyword used in a class definition to specify that a class is not to be instantiated, but rather inherited by other classes added by: JK, source: Sun Java Tutorial, reference: Glossary, 2001-10-19 11:35:56.0
has definition A keyword that means a class cannot be instantiated added by: DS, source: Sun Java Tutorial, reference: Source 2, 2001-10-19 11:35:56.0
has purpose
to indicate that a class cannot be instantiated
or to indicate that a method has no implementation
added by: JK, 2001-10-19 11:35:56.0
is a subtopic of Classes
is a subtopic of Methods
is an instance of keyword added by: DS, source: Sun Java Tutorial, 2001-10-19 11:35:56.0
is used to declare abstract class source: Object Oriented Software Engineering by Lethbridge and Laganière, 2001-10-19 11:35:56.0
is used to declare abstract method

syntactic unit has syntax rule
bold = mandatory
italic = non-terminal
normal font = optional
2001-10-19 11:38:04.0

abstract	can modify method, class, interface
	has definition A Java programming language keyword used in a class definition to specify that a class is not to be instantiated, but rather inherited by other classes
	has definition A keyword that means a class cannot be instantiated
	has purpose to indicate that a class cannot be instantiated or to indicate that a method has no implementation
	is a subtopic of Classes
	is a subtopic of Methods
	is an instance of keyword
	is used to declare abstract class
	is used to declare abstract method
syntactic unit	has syntax rule bold = mandatory italic = non-terminal normal font = optional