On Fri, 12 Feb 2021 22:12:30 GMT, Joe Darcy <[email protected]> wrote:
>> src/java.base/share/classes/java/lang/Comparable.java line 90:
>>
>>> 88: * of the {@code equals} method and the equivalence classes defined by
>>> 89: * the quotient of the {@code compareTo} method are the same.
>>> 90: *
>>
>> I think in both cases it should be "the equivalence class defined by...."
>> That is, "equivalence class" should be singular. But there are two of them,
>> so the sentence still properly concludes "... are the same."
>
> An equivalence relation defines a *set* of equivalence classes which
> partition the objects the relation operates on. For example, the "same signum
> value" equivalence relation on integers has three equivalence classes :
> 1) negative nonzero numbers (corresponding to signum == -1)
> 2) zero (corresponding to signum = 0)
> 3) positive nonzero numbers (corresponding to signum ==1)
OK, got it.
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PR: https://git.openjdk.java.net/jdk/pull/2471
