The new Objects class

[Marek Kozieł]

2010/1/10 Neal Gafter <neal at gafter.com>:
> On Sun, Jan 10, 2010 at 12:14 AM, Paulo Levi <i30817 at gmail.com> wrote:
>> Just seen the new Objects class in the java.util.
>>
>> I'd like to ask why does the
>>
>> public static int hash(Object... values)
>>
>> method, has the warning:
>> Warning: When a single object reference is supplied, the returned value does
>> not equal the hash code of that object reference. This value can be computed
>> by calling hashCode(Object).
>>
>> When it could be rewritten as :
>>
>> public static int hash(Object value1, Object value2, Object... restOfValues)
>>
>> to avoid that.
>
> That would make it hard to pass an array.
>
Hello.

Name "hashForArray" would not be better?

If there is need for efficiency improvements other methods can be
added to do not force arrays creation for low number of arguments:

public static int hash(Object value)
public static int hash(Object value, Object value1)
public static int hash(Object value, Object value1, Object value3)
public static int hash(Object... values)
public static int hash() // maybe ?


But I'm not sure if we need that, probably time will tell...

-- 
Pozdrowionka. / Regards.
Lasu aka Marek Kozieł