iam new to java. i have some confusion on final keyword.

this keyword is used to prevent method overloading.

but in thread, join() and isAlive() are declared as final.

eventhough it is final, these are used.

not in directly,

<threadObj>.t.join();
all the methods are directly acted on obj.

but here why, double dot.

if u know the explanation pls send it to me.