- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
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).
- Since:
- 1.8
- See Also:
- 
Method SummaryModifier and TypeMethodDescriptiondefault DoubleUnaryOperatorandThen(DoubleUnaryOperator after) Returns a composed operator that first applies this operator to its input, and then applies theafteroperator to the result.doubleapplyAsDouble(double operand) Applies this operator to the given operand.default DoubleUnaryOperatorcompose(DoubleUnaryOperator before) Returns a composed operator that first applies thebeforeoperator to its input, and then applies this operator to the result.static DoubleUnaryOperatoridentity()Returns a unary operator that always returns its input argument.
- 
Method Details- 
applyAsDoubledouble applyAsDouble(double operand) Applies this operator to the given operand.- Parameters:
- operand- the operand
- Returns:
- the operator result
 
- 
composeReturns a composed operator that first applies thebeforeoperator 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- the operator to apply before this operator is applied
- Returns:
- a composed operator that first applies the beforeoperator and then applies this operator
- Throws:
- NullPointerException- if before is null
- See Also:
 
- 
andThenReturns a composed operator that first applies this operator to its input, and then applies theafteroperator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.- Parameters:
- after- the operator to apply after this operator is applied
- Returns:
- a composed operator that first applies this operator and then
 applies the afteroperator
- Throws:
- NullPointerException- if after is null
- See Also:
 
- 
identityReturns a unary operator that always returns its input argument.- Returns:
- a unary operator that always returns its input argument
 
 
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