@FunctionalInterface public interface DoubleUnaryOperator
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)
.
Modifier and Type | Method | Description |
---|---|---|
default DoubleUnaryOperator |
andThen |
Returns a composed operator that first applies this operator to its input, and then applies the after operator to the result. |
double |
applyAsDouble |
Applies this operator to the given operand. |
default DoubleUnaryOperator |
compose |
Returns a composed operator that first applies the before operator to its input, and then applies this operator to the result. |
static DoubleUnaryOperator |
identity() |
Returns a unary operator that always returns its input argument. |
double applyAsDouble(double operand)
operand
- the operanddefault DoubleUnaryOperator compose(DoubleUnaryOperator before)
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.before
- the operator to apply before this operator is appliedbefore
operator and then applies this operatorNullPointerException
- if before is nulldefault DoubleUnaryOperator andThen(DoubleUnaryOperator after)
after
operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.after
- the operator to apply after this operator is appliedafter
operatorNullPointerException
- if after is nullstatic DoubleUnaryOperator identity()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/function/DoubleUnaryOperator.html