PDF two classes implementing same interface java PDF

Can a class implement more than one interface?

An interface is known as a blueprint for a class, and the class that implements an interface must provide an implementation for all the abstract methods or declare the abstract itself. In Java, the class can extend only a single class but can implement multiple interfaces.

Can We define an interface inside a Java class?

Java 8 Object Oriented Programming Programming. Yes, you can define a class inside an interface. In general, if the methods of the interface use this class and if we are not using it anywhere else we will declare a class within an interface.

Can a class extend more than one class in Java?

Java does not support multiple inheritance. This means that a class cannot extend more than one class. Therefore, following is illegal. public class extends Animal, Mammal{} However, a class can implement one or more interfaces, which has helped Java get rid of the impossibility of multiple inheritance. The extends keyword is used once, and the parent interfaces are declared in a comma-separated list.

How can class extend two classes in Java?

Two classes are not allowed, but a class can extend two interfaces in Java. This language allows extending two or more interfaces in a class. This code executes smoothly without any error. So, if you want to extend multiple inheritances, it would be better to use the interface. See the example below.