compact1, compact2, compact3
java.util.function
Interface DoubleUnaryOperator
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- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface DoubleUnaryOperator
Represents an operation on a singledouble-valued operand that produces adouble-valued result. This is the primitive type specialization ofUnaryOperatorfordouble.This is a functional interface whose functional method is
applyAsDouble(double).- Since:
- 1.8
- See Also:
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UnaryOperator
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method and Description default 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 Detail
applyAsDouble
double applyAsDouble(double operand)
Applies this operator to the given operand.- Parameters:
-
operand- the operand - Returns:
- the operator result
compose
default DoubleUnaryOperator compose(DoubleUnaryOperator before)
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:
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before- the operator to apply before this operator is applied - Returns:
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a composed operator that first applies the
beforeoperator and then applies this operator - Throws:
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NullPointerException- if before is null - See Also:
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andThen(DoubleUnaryOperator)
andThen
default DoubleUnaryOperator andThen(DoubleUnaryOperator after)
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:
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after- the operator to apply after this operator is applied - Returns:
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a composed operator that first applies this operator and then applies the
afteroperator - Throws:
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NullPointerException- if after is null - See Also:
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compose(DoubleUnaryOperator)
identity
static DoubleUnaryOperator 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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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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