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HashSet

 
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As set doesnt allow duplication, how would Hans and Jane be allowed to be added for the second time?
 
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You need to override equals() and hashCode() in Person class.
 
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Yes, since the persons all get their hashCode from class Object, every Person seems to be unique.
Perhaps modify the toString() method in a way that it returns:
return hashCode() + name;

and put a
System.out.println(g);
as last line of the main method.

Then you can see it.

Yours,
Bu.
 
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