Abstract classes and interfaces in Java serve fundamentally different purposes ... with only one abstract method cannot use lambdas. Table 1 summarizes the differences between abstract classes ...

To create abstract classes we use the 'abstract' keyword whereas keyword 'interface' is used to make the interfaces in Java. For inheritance the 'extends' keyword is used by the subclasses whereas ...

In Java, abstract classes and interfaces are two fundamental concepts used to implement abstraction and achieve polymorphism. They play a critical role in defining the structure and behavior of Java ...

Data members in inteface are always public. Data members in abstract class can be private, protected, etc. Methods in interface are by default abstract and public, java 8 can have body to the methods.