What is the difference between interfaces and classes in java

Flow Control in Java. Loops in Java. Jump Statements in Java. Arrays in Java. Strings in Java. OOPS in Java. Constructors in Java. Interfaces in Java. Keywords in Java. Exception Handling in Java. Collection Framework. Multi-threading in Java. Table of Contents. Save Article. Improve Article. Like Article. Rectangle int length, int width, String name. Unlike a class, an interface never implements methods; instead, classes that implement the interface implement the methods defined by the interface.

A class can implement multiple interfaces. The bicycle class and its class hierarchy define what a bicycle can and cannot do in terms of its "bicycleness. Classes and Interfaces are widely used in Object Oriented Programming. The difference between a class and an interface is that a class is a reference type which is a blueprint to instantiate an object and interface is a reference type which cannot be used to instantiate an object.

A class can implement many interfaces. But it can only extend one superclass. In interface can inherit many interfaces but there cannot be an implementation.

Both have their importance. The programmer can use them according to developing software. You can download PDF version of this article and use it for offline purposes as per citation note. Available here 2. Available here. Her areas of interests in writing and research include programming, data science, and computer systems. Your email address will not be published. Figure Program using Interfaces. Leave a Reply Cancel reply Your email address will not be published.

Class vs Interface. A class is a reference type that is a blueprint to create an object. An interface is a reference type that cannot be instantiated. Object Instantiation. A class is used to instantiate an object. An interface cannot be instantiated because the methods are unable to perform any action. A class contain a constructor, to initialize the variables.

An interface does not contain a constructor because they are hardly any variables to initialize. But a class describes the attributes and behaviors of an object. And an interface contains behaviors that a class implements. Mahesh Parahar. Previous Page Print Page. Next Page.