Specifications

Sun Services

Java™ Programming Language

Module 7, slide 34 of 44

Interfaces

•Apublic interface is a contract between client code and

the class that implements that interface.

• A Java interface is a formal declaration of such a contract

in which all methods contain no implementation.

• Many unrelated classes can implement the same

interface.

• A class can implement many unrelated interfaces.

• Syntax of a Java class is as follows:

class

<name> [

extends

<superclass>]

[

implements

<interface> [,<interface>]* ]

{

<member_declaration>*

}