9/12/2023 0 Comments Java interface vs abstract classesFortunately, there are plenty of resources available to help bring you up to speed. There are so many things to learn about in both Java and JavaScript. How to Learn More About Java and Javascript Also, a good choice when your classes need additional behavior or dependency injection. Use when several implementations of the same type share common behavior, Additionally, use it if you require a base class.īest used when various implementations share only method signature. Cannot have implementation due to interfaces providing pure abstractionĬan have final, non-final, static, and non-static variables Can have default method implementationĬan only have abstract methods, though, since Java 8, it can also have static and default methods. Also, interface can be implemented by using the keyword “implements”Ĭan have abstract and non-abstract methods. Interface keyword used to declare interface. Also, the abstract class can be extended by using the keyword “extends” Interface is slower and requires extra indirection or dereferencingĬannot be instantiated, but it can be invoked if main () existĬannot be instantiated, as it is absolutely abstractĪbstract keyword used to declare the abstract class. Can extend another regular (or concrete) class.Ĭan extend any number of interfaces. Users can define both fields and constantsĮxtends just one class or one abstract class at a time. So here we go:ĭoes not have access modifiers, and everything defined inside is assumed to be a public modifierĬannot declare constructors or destructorsĬan have any type of class member (e.g., public, private, protected) The best way to quickly and easily compare abstract class vs interface Java is to illustrate the information in a table. What is the Difference Between Abstract Class vs Interface Java? Now let’s explore the primary differences between abstract class and interface.
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