Difference From The C++ const Type Qualifier
A final variable in Java means that variable can't be reassigned after initialization. C++ const can be used in this way (SomeClass * const ptr). The more common use SomeClass const * ptr means that the data being referenced can't be modified, although the reference itself can be changed to refer to different data. Both usages of C++ const can be combined (SomeClass const * const ptr).
Java's final is a hard rule. If you have a final variable, you cannot reassign it.
Read more about this topic: Final (Java)
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