Interface DoubleUnaryOperator
- 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 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:
UnaryOperator
Method Summary
Modifier and Type | Method | Description |
---|---|---|
default DoubleUnaryOperator | andThen(DoubleUnaryOperator after) | Returns a composed operator that first applies this operator to its input, and then applies the |
double | applyAsDouble(double operand) | Applies this operator to the given operand. |
default DoubleUnaryOperator | compose(DoubleUnaryOperator before) | Returns a composed operator that first applies the |
static DoubleUnaryOperator | identity() | Returns a unary operator that always returns its input argument. |
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 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
- the operator to apply before this operator is applied - Returns:
- a composed operator that first applies the
before
operator and then applies this operator - Throws:
-
NullPointerException
- if before is null - See Also:
andThen(DoubleUnaryOperator)
andThen
default DoubleUnaryOperator andThen(DoubleUnaryOperator after)
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
- the operator to apply after this operator is applied - Returns:
- a composed operator that first applies this operator and then applies the
after
operator - Throws:
-
NullPointerException
- if after is null - See Also:
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