list literal gotcha and suggestion

[Mark Thornton]

abies at adres.pl wrote:
>  
> "Joseph D. Darcy" <Joe.Darcy at Sun.COM> napisał(a): 
>  
>  > A class cannot simultaneously satisfy the List and Set contracts for 
>  > equals; various properties fail to hold such as (a.equals(b) && 
>  > a.equals(c) ==> b.equals(c)):
>  > if listset.equals(list) && listset.equals(set), list.equals(set) will 
>  > *not* be true.
>  
>
> Even easier example is hashCode - list starts with 1 for empty and is doing *31 for each element, while set starts with 0 and is just sum of elements' hashcodes (to avoid being iteration order dependent).
>
>
>   
Yes, I realised that problem after turning off my machine last night. Pity.

Mark