| Interface | Description | 
|---|---|
| DoubleComparator | A comparator of two double values. | 
| FloatComparator | A comparator of two float values. | 
| FloatUnaryOperator | Represents an operation that takes a float-valued operand and produces
 afloat-valued result. | 
| IntComparator | A comparator of two int values. | 
| LongComparator | A comparator of two long values. |