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Added in API level 24

Summary: Methods | Inherited Methods | [Expand All]

public interface BinaryOperator
implements BiFunction<T, T, T>

java.util.function.BinaryOperator<T>

表示对两个相同类型操作数的操作，生成与操作数相同类型的结果。对于操作数和结果都是相同类型的情况，这是BiFunction的专门化。

也可以看看：

公共方法(Public methods)
`static <T> BinaryOperator<T>`	`maxBy(Comparator<? super T> comparator)` 返回一个 `BinaryOperator` ，它根据指定的 `Comparator`返回两个元素中较大的 `Comparator` 。
`static <T> BinaryOperator<T>`	`minBy(Comparator<? super T> comparator)` 返回一个 `BinaryOperator` ，它根据指定的 `Comparator`返回两个元素中较小的 `Comparator` 。

From interface java.util.function.BiFunction

Added in API level 24

BinaryOperator<T> maxBy (Comparator<? super T> comparator)

返回 BinaryOperator ，根据指定的 Comparator返回两个元素中较大的 Comparator 。

参数(Parameters)
`comparator`	`Comparator`: a `Comparator` for comparing the two values

返回(Returns)
`BinaryOperator<T>`	a `BinaryOperator` which returns the greater of its operands, according to the supplied `Comparator`

抛出异常(Throws)
`NullPointerException`	if the argument is null

Added in API level 24

BinaryOperator<T> minBy (Comparator<? super T> comparator)

返回一个 BinaryOperator ，它根据指定的 Comparator返回两个元素中较小的 Comparator 。

参数(Parameters)
`comparator`	`Comparator`: a `Comparator` for comparing the two values

返回(Returns)
`BinaryOperator<T>`	a `BinaryOperator` which returns the lesser of its operands, according to the supplied `Comparator`

抛出异常(Throws)
`NullPointerException`	if the argument is null