From an object-oriented programming perspective ... Only functional interfaces can use the lambda feature in Java. Abstract classes with only one abstract method cannot use lambdas.

For example, using the keyword implements will make a Java interface, while the keyword extends makes an abstract class. Encapsulation in object-oriented programming is the process of wrapping all the ...

Sealed classes work together with records and pattern matching to support a more data-centric form of programming ... (See Effective Java, "Prefer interfaces to abstract classes".) ...

If you want to master functional programming, the best place to start is with the Java Function interface ... as is the case with object models designed with abstract classes and interfaces. Power ...