JAVA INTERFACE DEFAULT METHOD CODE

So, developers can use either Old runtime or new runtime libraries to successfully run the existing project or program.

JAVA INTERFACE DEFAULT METHOD CODE

So, the Java Runtime does not throw an exception for missing implementations for new abstract methods found in the updated interfaces.ĭefault return-type METHOD_NAME(Parameters)Ī Java default method allows a developer to add new functionality or feature to the Source code without bothering about breaking the dependencies and usages. Java interface default method avoids the need for updating the own source code immediately. Updating the own project code and compiling it to avail the new features.Updating the project Runtime Environment with the latest Java libraries containing classes and interfaces.There are two things Java developers take care of. It uses the public access modifier by default. The default method in a Java interface is a concrete (non-abstract) method that will be called at runtime if the implementation is missed by the implementor class due to Source code changes.Ī Java default method can not be declared static or abstract or private or protected. The compiler throws an error. Note: The keyword 'default' is also used with SWITCH CASE control statements. Let us know more with examples in this Last Minute Java Tutorial. These are against the concept of an interface is a 100% abstract class.

Java 1.8 or Java 8 introduced new features in Interface namely STATIC method and Java DEFAULT method.