We promptly write a method isBlueToothEnabled() in the interface DeviceAPI. Its all going fine when we come to know that a wearable device has come out which needs to have a check for whether bluetooth is enabled on the device. Now, over a period of time many devices are rolled out and for each new device we implement the DeviceAPI interface and hence, we also implement all the abstract methods. Inside an interface we need to mark a default method with the modifier default as shown in example below – These methods are available to all classes which implement this interface.
This article will focus on default methods.ĭefault methods are methods implemented in an interface, are non-abstract, and marked by the modifier default. I have dealt with static methods in a separate article Click to Read Tutorial on Java 8’s Static vs Default Methods. These can be written in 2 ways – static methods & default methods.
JAVA INTERFACE DEFAULT METHOD CODE
However, interfaces can have implemented code in Java 8. interfaces will act as APIs for your design. Well, the API part is still true in Java 8 i.e. Methods defined in an interface for a type were considered to be the API methods for that type and any classes implementing that API had to implement all the methods.
This tutorial explains what are default methods in Java 8 with examples, why they are useful and how they can be used to enhance the design of your code.Ī little background: Prior to Java 8 interfaces could not have any implemented code.
0 kommentar(er)
