What methods should go into a java.util.Objects class in JDK 7?

Joseph D. Darcy Joe.Darcy at Sun.COM
Fri Oct 2 17:49:36 UTC 2009

Jason Mehrens wrote:
> Joe,
>  > * null safe toString(Object), returning "null" for a null argument
> Doesn't String.valueOf do the same thing?
> http://java.sun.com/javase/6/docs/api/java/lang/String.html#valueOf(java.lang.Object 
> <http://java.sun.com/javase/6/docs/api/java/lang/String.html#valueOf%28java.lang.Object>)

Indeed it does!  I'll replace the implementation with a call to 
String.valueOf and update the javadoc accordingly.  Thanks for spotting 
> What about a toIdentityString(Object) instead?  Some of the nice 
> properties of an identity string is that it is safe to

By toIdentityString, do you mean the String that would be returned by 
toString if toString is not overridden?


> call from multiple threads even on objects that are not thread safe 
> (JComponent), won't deadlock if toString is synchronized (observed in 
> logging), and won't build run away strings (nCopies(Integer.MAX_VALUE, 
> "lookout").toString()).
> Jason
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