using synchronized

Hi all
is it allowed to use static key in the synchronized block and is the answer is yes is it allowed to use empty string?

public class A
{
       private static key = ""
       
       public A() {
            synchronized (key) {
                    ............
            }
       }
}
dannyshAsked:
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TimYatesCommented:
yes, yes
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TimYatesCommented:
>  is it allowed to use empty string

the empty string is still a string object, and synchronized ties to an object, not neccesarially a string with any meaning (or an integer with any value)...
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