Must autoboxing call valueOf?

[Sam Munkes]

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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