Diff Between Abstract Class And Interface In Java 8

2 abstract class doesnt support multiple inheritance. If you are designing api then use interface and if you are abstracting both state and behavior then use an abstract class. The key difference is that abstract class can maintain state but the interface cannot and an abstract class can also have a constructor which is not allowed inside interface even in java 8.
diff between abstract class and interface in java 8

Jdk 8 brings arguably the abstract classs greatest advantage over the interface to the interface.

Diff between abstract class and interface in java 8. Since java 8 it can have default and static methods also. The implication of this is that a large number of abstract classes used today can likely be. While an abstract class is a class an interface is an interface. Well java does not support multiple inheritances but one can implement multiple inheritances in java.

Note that from java 8 onwards we can create default and static methods in interface that contains the method implementations. Abstract class can have abstract and non abstract methods. An abstract class may contain non final variables. From java 8 it can have default and static methods also.

3 abstract class can have final non final static and non static variables. Interface supports multiple inheritance. Interface has only static and final variables. Abstract classes can have methods with implementation whereas interface provides absolute abstraction and cant have any method implementations.

It means while an interface can only extend another java interface an abstract class can implement multiple inheritances in java. Variables declared in a java interface are by default final.