View Nirupama  Pathak 's Profile
How to define an Interface in Java ?
In Java Interface defines the methods but does not implement them. Interface can include constants. A class that implements the interfaces is bound to implement all the methods defined in Interface.
Emaple of Interface:

public interface sampleInterface {
public void functionOne();

public long CONSTANT_ONE = 1000;
}
Asked by Nirupama Pathak | Sep 14 2017 | Report this Report abuse
Replies (7)
View Diksha  Basu 's Profile
As mentioned above they are used for abstraction. Since methods in interfaces do not have body, they have to be implemented by the class before you can access them. The class that implements interface must implement all the methods of that interface. Also, java programming language does not support multiple inheritance, using interfaces we can achieve this as a class can implement more than one interfaces, however it cannot extend more than one classes.

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Sep 19 2017 | Report this Report abuse
View Khushi   Kumari 's Profile
As mentioned above they are used for abstraction. Since methods in interfaces do not have body, they have to be implemented by the class before you can access them. The class that implements interface must implement all the methods of that interface. Also, java programming language does not support multiple inheritance, using interfaces we can achieve this as a class can implement more than one interfaces, however it cannot extend more than one classes.

To Know More Visit the :-http://www.cetpainfotech.com/technology/java-training
Sep 19 2017 | Report this Report abuse
View Khushi   Kumari 's Profile
For such type of query and certification you can check the link below

http://www.vskills.in/certification/Certified-Core-Java-Developer
Sep 18 2017 | Report this Report abuse
View Roshan  shah 's Profile
For such type of query and certification you can check the link below

http://www.vskills.in/certification/Certified-Core-Java-Developer
Sep 18 2017 | Report this Report abuse
View Tanya  Sharma 's Profile
Iterator is an interface which is used to step through the elements of a Collection.
Sep 18 2017 | Report this Report abuse
View Shivendu  Chatterjee 's Profile
Is Iterator a Class or Interface? What is its use?
Sep 18 2017 | Report this Report abuse
View Chinmay  Hegde 's Profile
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Sep 18 2017 | Report this Report abuse