Class and Objects in Java

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Class and Objects

Class : A category could be outlined as a blueprint or a set of instruction to construct a  particular sort of object. Class present find out how to declare fields, strategies, and constructors.

we declare a category by specifying the category key phrase adopted by a non-reserved identifier that names it. A pair of matching open and shut brace characters ({ and }) following it.

class className      





E.g. : class Pupil


Int rollno;

String title;

void setRollno( );



Objects : Objects have states and behaviors. Instance: A canine has states – shade, title, breed in addition to behaviors – wagging the tail, barking, consuming. An object is an occasion of a category.

Different definitions of object embrace :

  • Object is an actual world entity.
  • Object is a run time entity.
  • Object is an entity which has state and conduct.
  • Object is an occasion of a category.