Abstract Classes and Methods
Explore abstract classes and methods within Java programming to understand how they enforce method implementation in derived classes. Learn the syntax, rules, and benefits of abstraction by working through examples of animal behaviors modeled with abstract classes and concrete subclasses. This lesson explains how to structure code for modularity and reusability while applying core principles of object-oriented programming.
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Abstract methods
A method with the keyword
abstractin its declaration is known as an abstract method.
Rules to be followed
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In contrast to a concrete/normal Java method an abstract method does not have a body/definition i.e. it only has a declaration or method signature inside an abstract class or an interface.
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An abstract method can be declared inside an abstract class or an interface only.
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In other words, it can be said that to contain any abstract method in its implementation a class has to be declared as an abstract class because non-abstract classes cannot have abstract methods.
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An abstract ...