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interface comparison table

Subject	implement by	consider	have	be	is a kind of	is a subtopic of	have example	group	describe	hide	have purpose	implement using	confuse with	has definition	help	provide	draw as	show	create using	see also
Java interface	a class	an extreme example of a horizontal framework: There is no implementation, and all the specified methods represent slots that must be filled	any concrete methods or instance variables	like a class except that it does not have any executable statements - it only contains abstract methods and class variables	interface	3.3 - Frameworks: Reusable Subsystems	public interface Drawable { public abstract Image drawImage(); public abstract Image drawImage(int height, int width); public abstract Image drawBlackAndWhiteImage(int height, int width); }	the pieces of data that describe some entity, so that programmers can manipulate that data as a unit	a portion of the visible behaviour of a set of objects	the details of data	to specify a set of methods that a variety of different classes can implement polymorphically	the implements keyword in Java	generalizations	In Java, a software module containing a description of a set of operations that certain classes must implement	a programmer to cope with the complexity of data	many of the same benefits as multiple inheritance	a small circle (like a lollipop), labelled with the name of the interface or as a class rectangle, with the expression Ğinterfaceğ at the top, and (optionally) a list of supported operations in a UML diagram	a can-be-seen-as relation between the implementing class and the interface	superclasses containing only abstract methods in some languages	interface^3

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