Get started with polymorphism in Java and how to do method invocation in polymorphic method calls.

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Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance.

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

Single inheritance is a feature in Java where a class can inherit only one parent class. In other words, a subclass can only inherit from one superclass. This is also known as "is-a" relationship, ...

Java Program For Hybrid Inheritance Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.

The programming system derives its ability to grade in the presence of errors from the use of the Java reflection classes, the Java inheritance mechanism, and Perl regular expressions. The reflection ...