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Java encapsulation

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By Nancy 2015 | By Nancy | CONFIDENTIAL Objective-Day4(1 hour)      Instanceof operator Encapsulation Java Array Call By Value and Call By Reference strictfp keyword 2015 | By Nancy | CONFIDENTIAL Instanceof operator    The java instanceof operator is used to test whether the object is an instance of the specified type (i.e. class or subclass or interface). It returns either true or false. If we apply the instanceof operator with any variable that has null value, it returns false. 2015 | By Nancy | CONFIDENTIAL Simple example 2015 | By Nancy | CONFIDENTIAL Instanceof operator    An object of subclass type is also a type of parent class. It holds IS-A relation. For example, if Cat extends Animal then object of Cat can be referred by either Cat or Animal class. 2015 | By Nancy | CONFIDENTIAL With null value…  If we apply instanceof operator with a variable that have null value, it returns false. 2015 | By Nancy | CONFIDENTIAL Encapsulation     Encapsulation in Java is the mechanism of wrapping the data (or variables) and code acting on the data (or methods) together as a single unit. The Java Bean class is the example of fully encapsulated class. It is just for hiding the implementation details from users. To achieve encapsulation in Java…  Declare the variables of a class as private.  Provide public setter and getter methods to modify and view the variables values. 2015 | By Nancy | CONFIDENT ...
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