Must autoboxing call valueOf?

[Jonathan Gibbons]

Sam,

The relevant text would appear to be in JLS 5.1.7, Boxing Conversion.

https://docs.oracle.com/javase/specs/jls/se8/html/jls-5.html#jls-5.1.7

-- Jon



On 08/05/2015 05:28 PM, Sam Munkes wrote:
> Hi -
>
> A colleague of mine was wondering if the following statements are 
> guaranteed to be true:
> ((Boolean)true) == Boolean.TRUE
> ((Boolean)true) == Boolean.valueOf(true)
> ((Integer)1) == Integer.valueOf(1)
>
> javac does indeed call valueOf() for autoboxing, but is this behavior 
> mandated by the JLS?
>
> The answers on stackoverflow 
> http://stackoverflow.com/questions/31445024/does-autoboxing-call-valueof agree 
> that although in practice the compilers use valueOf(), the JLS does 
> not mandate it.
>
> Does anyone here know more on the subject?
>
> Thanks
>
> Sam

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