How do I implement multiple inheritance without using. To solve the problem of mutiple inheritance in Java .
Multiple inheritance using interfaces to calculate the area of a rectangle and triangle /* Area Of Rectangle and Triangle using Interface. This Java program implements the following Multiple Inheritance. Mark2 Interface: Exam Percent What is interface in Java with Example. What is interface in Java. Interface in java is core part of Java programming language and one of the way to achieve abstraction in Java along with abstract class. Even though interface is fundamental object oriented concept ; Many Java programmers thinks Interface in Java as advanced concept and refrain using interfacefrom early in programming career. At very basic level interface in java is a keyword but same time it is an object oriented term to define contracts and abstraction , This contract is followed by any implementation of Interface in Java. Since multiple inheritance is not allowed in Java, interfaceis only way to implement multiple inheritance at Type level. In this Java tutorial we will see What is an interface in Java, How to use interface in Java and where to use interface in Java and some important points related to Java interface. What is an interface in Java is also a common core Java question which people asked on various programming exams and interviews. Key Points about Interface in Java. In last section we saw What is an interface in Java and learned that interface provides abstraction in Java and its only way to achieve multiple inheritance at type level in Java. In this section we will see some important properties of interface in Java. Interface in java is declared using keyword interface and it represent a Type like any Class in Java. Its also a good Object oriented design principle to . This maintenance aspect of interface is also sought in various software design interview questions in Java. All variables declared inside interface is implicitly public final variable or constants. We have used both Class and interface for storing application wide constants and advantage of using Interface was that you can implement interface and can directly access constants without referring them with class name which was the case earlier when Class is used for storing Constants. Though after introduction of static imports in Java 5 this approach doesn't offer any benefit over Class approach. All methods declared inside Java Interfaces are implicitly public and abstract, even if you don't use public or abstract keyword. That's why interface is used to define contracts in terms of variables and methods and you can rely on its implementation for performing job. In Java its legal for an interface to extend multiple interface. This is not true for Class in Java and one Class can only extend at most another Class. In Java one Class can implement multiple interfaces. They are required to provide implementation of all methods declared inside interface or they can declare themselves as abstract class. Example of interface in Java interface Session. IDCreator extends. Serializable, Cloneable. Its one of those coding practice which should be in your code review checklist. When to use interface in Java. Interface is best choice for Type declaration or defining contract between multiple parties. If multiple programmer are working in different module of project they still use each others API by defining interface and not waiting for actual implementation to be ready. This brings us lot of flexibility and speed in terms of coding and development. Use of Interface also ensures best practices like . Though interface in Java is not the only one who provides higher level abstraction, you can also use abstract class but choosing between Interface in Java and abstract class is a skill. Difference between Interface in Java and abstract class in java is also a very popular java interview question. That's it for now on What is Interfacein Java, specifics of Java interface and How and when to use Interface in Java. If you are not yet using interface in your code than start thinking in terms of interfaces and use it as much possible. You will learn more about interfaces when you start using design patterns.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2016
Categories |