DoubleUnaryOperator

  • DoubleUnaryOperator is a functional interface representing an operation on a single double input that produces a double output.

  • It is a specialization of UnaryOperator for double primitive type.

  • The core method is applyAsDouble(double) which applies the operation to the given operand.

  • DoubleUnaryOperator provides methods for composing operators like andThen and compose to chain operations.

  • It also includes an identity method that returns an operator returning its input unchanged.
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).

See Also

Public Method Summary

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.
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

public 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

public abstract double applyAsDouble (double operand)

Applies this operator to the given operand.

Parameters
operand the operand
Returns
  • the operator result

public 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

public static DoubleUnaryOperator identity ()

Returns a unary operator that always returns its input argument.

Returns
  • a unary operator that always returns its input argument