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Defines to keeping all the related members together in an object. Specifying member variables as private may hide the methods and variables. Objects should hide their inner workings from the outside part. Good encapsulation gives code modularity by preventing objects interacting with each other in an unexpected way, which in turn builds future development and refactoring efforts easy.
Being able to encapsulate members of a class is important for integrity and security. We may protect variables from unacceptable values. The sample code above describes how encapsulation may be used to protect the MyMarks object from having negative values. Any modification to member variable "vmarks" can only be laid out through the setter method setMarks(int mark). This prevents the object "MyMarks" from needing any negative values by throwing an exception.
You want the base class to represent only an interface for its derived classes. That means, you don't want anyone to actually instantiate an object of the parent class. You only
Why Local variable is preferred over Global variable ? In my point of view Global variable has a few advantage along with Local variables is preferred because of the subsequent
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What is Alternate Text ? The APPLET element can have an ALT attribute. An ALT attribute is used through a browser which understands the APPLET tag but for some purpose cannot
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