- 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 Summary
Modifier 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.
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Method Details
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applyAsDouble
double applyAsDouble(double operand) Applies this operator to the given operand.- Parameters:
operand- the operand- Returns:
- the operator result
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compose
Returns 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:
-
andThen
Returns 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:
-
identity
Returns a unary operator that always returns its input argument.- Returns:
- a unary operator that always returns its input argument
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