Asked by: Yajaira Lincan
asked in category: General Last Updated: 29th June, 2020

Can we change the state of an object to which a final reference variable is pointing?

final means that you can't change the object's reference to point to another reference or another object, but you can still mutate its state (using setter methods e.g). Whereas immutable means that the object's actual value can't be changed, but you can change its reference to another one.

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In this regard, can a final variable be changed?

Final variable in Java cannot be changed. Once if we have assigned the final variable it can not be changed it is fixed. but if you have declare a blank final variable then you can assign value to it only in constructor.

can we declare object as final? You declare a reference as final and not the actual object. That means, you cannot change the value of the reference (which is an address pointing to the object). So once you declare a reference as final, you cannot reassign it to another object. So declaring a variable as final is like making it a constant.

Additionally, what is a final variable?

final keyword in java. First of all, final is a non-access modifier applicable only to a variable, a method or a class. Following are different contexts where final is used. Final variables. When a variable is declared with final keyword, its value can't be modified, essentially, a constant.

How do you set a final variable in Java?

A final variable can only be initialized once, either via an initializer or an assignment statement. If a final variable is not initialized at the time of declaration, then it must be initialized inside constructor of the class in which it is declared. Such variable is also called a blank final variable.

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