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 ...

And the terms and conditions in case of Java interface is to override all the methods of interface. Just like Abstract Classes, Interfaces can't be instantiated but they can have still have Object ...

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.