Java allows extending class to any class, but it has a limit . It means a class can extend only a single class at a time. Extending more than one class will lead to code execution failure. When a class extends a class, then it is called single inheritance .
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The extends keyword extends a class (indicates that a class is inherited from another class ). In Java, it is possible to inherit attributes and methods from one class to another. We group the “inheritance concept” into two categories: subclass (child) – the class that inherits from another class.
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