How do you use the method of an object?

You also use an object reference to invoke an object’s method. You append the method’s simple name to the object reference, with an intervening dot operator (.) . Also, you provide, within enclosing parentheses, any arguments to the method. If the method does not require any arguments, use empty parentheses.

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What is a final class?

A final class is a class that can’t be extended . Also methods could be declared as final to indicate that cannot be overridden by subclasses. Preventing the class from being subclassed could be particularly useful if you write APIs or libraries and want to avoid being extended to alter base behaviour.22 May 2018

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