Added in API level 24

DoubleUnaryOperator

@FunctionalInterface interface DoubleUnaryOperator

java.util.function.DoubleUnaryOperator

Represents an operation on a single double-valued operand that produces a double-valued result. This is the primitive type specialization of UnaryOperator for double.

This is a functional interface whose functional method is applyAsDouble(double).

Summary

Public methods
open DoubleUnaryOperator!	`andThen(after: DoubleUnaryOperator!)` Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
abstract Double	`applyAsDouble(operand: Double)` Applies this operator to the given operand.
open DoubleUnaryOperator!	`compose(before: DoubleUnaryOperator!)` Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.
open static DoubleUnaryOperator!	`identity()` Returns a unary operator that always returns its input argument.

Public methods

andThen

Added in API level 24

open fun andThen(after: DoubleUnaryOperator!): DoubleUnaryOperator!

Returns a composed operator that first applies this operator to its input, and then applies the after operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.

Parameters
`after`	DoubleUnaryOperator!: the operator to apply after this operator is applied

Return
`DoubleUnaryOperator!`	a composed operator that first applies this operator and then applies the `after` operator

Exceptions
`java.lang.NullPointerException`	if after is null

See Also

#compose(DoubleUnaryOperator)

applyAsDouble

Added in API level 24

abstract fun applyAsDouble(operand: Double): Double

Applies this operator to the given operand.

Parameters
`operand`	Double: the operand

Return
`Double`	the operator result

compose

Added in API level 24

open fun compose(before: DoubleUnaryOperator!): DoubleUnaryOperator!

Returns a composed operator that first applies the before operator to its input, and then applies this operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.

Parameters
`before`	DoubleUnaryOperator!: the operator to apply before this operator is applied

Return
`DoubleUnaryOperator!`	a composed operator that first applies the `before` operator and then applies this operator

Exceptions
`java.lang.NullPointerException`	if before is null

See Also

#andThen(DoubleUnaryOperator)

identity

Added in API level 24

open static fun identity(): DoubleUnaryOperator!

Returns a unary operator that always returns its input argument.

Return
`DoubleUnaryOperator!`	a unary operator that always returns its input argument