As a freelancer, if you are working with the use of interface in Java, it is essential that you can fully grasp which Java types can implement and declare an interface. Read on to know- Java class- Java classes are the core components of a Java application. A simple Java program might be made up of a single Java class. However, as your program grows, it can be difficult to keep your code in one class, so splitting your code into many classes is usually a good idea. Java abstract class- A Java abstract class is a class that cannot be instantiated. The freelancer cannot create a new instance of the class. It functions as a base to subclasses. Java nested class- Nested classes, as you may guess, are classes that are nested inside another class. The purpose of the nested class is to separate and categorize the nested class and the surrounding classes. Java enum- Java enum is a type of Java that is used to construct collections of constants. It is a subtype of a Java class. Constants, methods, and other data can be stored in a Java enum for further use. Java dynamic proxy- Java reflection may be used to build dynamic interface implementations at runtime. The dynamic proxy can be used for a variety of applications like database connection and transaction management, dynamic mock objects for unit testing, and many others. Now that you know which Java types can implement an interface, wait no more! Eiliana is a platform that provides opportunities to skilled freelancers who can use of the interface in Java and enhance the uses of Java. Now, freelancers can register themselves anonymously and get paid handsomely.