About Question enthuware.ocpjp.v7.2.1512 :

[logtwo]

I'm fine with the answer, however it says:

The Collection class contains a synchronizedCollection() method that creates thread-safe instances based on collections which are not.

The class containing synchronizedCollection shouldn't be Collections (with the 's') rather than Collection ?

Thank you

[admin]

Yes, it should be Collections as is given in the code sample below. Fixed.
thank you for your feedback!