I have 4 Classes that look like this: Why can’t I access the default implementation coming from extending Bar? Answer BarImpl can not invoke Foo’s default method explicitly, as BarImpl is not directly implementing Foo. It’s extending Bar which directly implements Foo, hence, it’s Bar’s decision to overr…
Tag: default-method
Spring JPA repository interface and default methods use case
I am currently wondering whether a particular use case could be elegantly addressed by using a default interface method inside a JPA repository. Suppose we have the following entity and supporting types: I need to be able to query a list of SomeEntity based on combination of Status enumeration values. With Sp…
How to explicitly invoke default method from a dynamic Proxy?
Since Java 8 interfaces could have default methods. I know how to invoke the method explicitly from the implementing method, i.e. (see Explicitly calling a default method in Java) But how do I explicitly invoke the default method using reflection for example on a proxy? Example: Edit: I know a similar questio…
Why is “final” not allowed in Java 8 interface methods?
One of the most useful features of Java 8 are the new default methods on interfaces. There are essentially two reasons (there may be others) why they have been introduced: Providing actual default implementations. Example: Iterator.remove() Allowing for JDK API evolution. Example: Iterable.forEach() From an A…