However, visibility for subclasses can be given for these variables with the use of access modifiers. Normally, it is recommended to make these variables private (access level). The instance variables are visible for all methods, constructors, and block in the class. Instance variables can be declared at the class level before or after use.Īccess modifiers can be given for instance variables. Instance variables hold values that must be referenced by more than one method, constructor or block, or essential parts of an object's state that must be present throughout the class. Instance variables are created when an object is created with the use of the keyword 'new' and destroyed when the object is destroyed. When space is allocated for an object in the heap, a slot for each instance variable value is created. Instance variables are declared in a class, but outside a method, constructor or any block.
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