Enthuware • About Question enthuware.ocpjp.v7.2.1585 :

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About Question enthuware.ocpjp.v7.2.1585 :

Posted: Sun Dec 11, 2016 2:35 pm

by sir_Anduin@yahoo.de

It allows null value to be stored.

how does that work?

Re: About Question enthuware.ocpjp.v7.2.1585 :

Posted: Sun Dec 11, 2016 10:28 pm

by admin

Code: Select all

    HashSet hs = new HashSet();
    hs.add(null);
    System.out.println(hs);

Prints:

Code: Select all

[null]

HTH,
Paul.