CODEWITHSUNDEEP
javastaticfinaltransient
wvdz
wvdz

Reputation: 16651

What is the effect of static final transient in Java?

In the code base I am working on, nearly all variables that are declared static final String are also declared transient.

So I have fields like:

public static final transient String VERSION = "1.0";

I am tempted to remove these transient keywords whenever I spot them, because I think it doesn't serve any purpose.

Is there any difference in behaviour between using transient or not in this case?

Upvotes: 9

Views: 6692

Answers (3)

Anubha Tripathi
Anubha Tripathi

Reputation: 21

static members are associated with a class not with the object, hence on deserialization you will see the value you passed on, as opposed to the default values shown while using transient. To have a better understanding try to change the value of the variables after serialization and then on deserialization you will see that the values of serialized members are same but static one has changed. As per the transient final ,final variables do participate in serialization directly by thier values,hence no use of declaring a final variable as transient.

Upvotes: 1

Tobb
Tobb

Reputation: 12225

The transient keyword on a variable will ensure that the variable is not part of the serialized object when serializing. If your class is not serializable, nor a JPA entity (which uses the transient keyword to avoid storing variables in the database), removing it should be fine.

Upvotes: 2

Gaël J
Gaël J

Reputation: 15275

A static field is implicitly transient (when serializing a static field, its value will be lost anyway). So indeed, no need to declare both.

Upvotes: 12

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