Web Reference: Abstract classes are similar to interfaces. You cannot instantiate them, and they may contain a mix of methods declared with or without an implementation. However, with abstract classes, you can declare fields that are not static and final, and define public, protected, and private concrete methods. Jan 20, 2026 · An abstract method is a method declared without an implementation (i.e., a body). It only defines the method signature, and subclasses must provide the implementation. A class containing one or more abstract methods must be declared abstract. Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class). Abstract method: can only be used in an abstract class, and it does not have a body.
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