added in API level 24

DoubleUnaryOperator

public interface DoubleUnaryOperator

java.util.function.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).

See also:

Summary

Public methods

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.

abstract double applyAsDouble(double operand)

Applies this operator to the given operand.

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.

static DoubleUnaryOperator identity()

Returns a unary operator that always returns its input argument.

Public methods

andThen

added in API level 24
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 DoubleUnaryOperator: the operator to apply after this operator is applied

Returns
DoubleUnaryOperator a composed operator that first applies this operator and then applies the after operator

Throws
NullPointerException if after is null

applyAsDouble

added in API level 24
double applyAsDouble (double operand)

Applies this operator to the given operand.

Parameters
operand double: the operand

Returns
double the operator result

compose

added in API level 24
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 DoubleUnaryOperator: the operator to apply before this operator is applied

Returns
DoubleUnaryOperator a composed operator that first applies the before operator and then applies this operator

Throws
NullPointerException if before is null

identity

added in API level 24
DoubleUnaryOperator identity ()

Returns a unary operator that always returns its input argument.

Returns
DoubleUnaryOperator a unary operator that always returns its input argument