A Java keyword. Classes or methods defined as abstract define a runtime behavior but do not provide a complete implementation. You cannot create an object from an abstract class, but an object created from a class that extends the abstract class can be referred to with the abstract class name. When applied to member methods, it declares that the implementation of the function must be provided by subclasses, unless they are also declared as abstract classes. Any class that contains abstract methods must be declared abstract. An abstract class cannot be declared final.
- American Standard Code for Information Interchange (ASCII)
A widely used encoding standard for text and control characters. Java uses Unicode internally but appears ...