java8.util.function

Class DoubleUnaryOperators

java.lang.Object

java8.util.function.DoubleUnaryOperators

public final class DoubleUnaryOperators
extends java.lang.Object

A place for static default implementations of the new Java 8 default interface methods and static interface methods in the DoubleUnaryOperator interface.

Method Summary

Modifier and Type	Method and Description
static DoubleUnaryOperator	andThen(DoubleUnaryOperator this_, DoubleUnaryOperator after) Returns a composed operator that first applies the this_ operator to its input, and then applies the after operator to the result.
static DoubleUnaryOperator	compose(DoubleUnaryOperator this_, DoubleUnaryOperator before) Returns a composed operator that first applies the before operator to its input, and then applies the this_ operator to the result.
static DoubleUnaryOperator	identity() Returns a unary operator that always returns its input argument.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

compose

public static DoubleUnaryOperator compose(DoubleUnaryOperator this_,
                                          DoubleUnaryOperator before)

Returns a composed operator that first applies the before operator to its input, and then applies the this_ operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.

Parameters:

this_ - the operator to apply after the before operator is applied

before - the operator to apply before the this_ operator is applied

Returns:

a composed operator that first applies the before operator and then applies the this_ operator

Throws:

java.lang.NullPointerException - if this_ is null

java.lang.NullPointerException - if before is null

See Also:

andThen(DoubleUnaryOperator, DoubleUnaryOperator)

andThen

public static DoubleUnaryOperator andThen(DoubleUnaryOperator this_,
                                          DoubleUnaryOperator after)

Returns a composed operator that first applies the 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:

this_ - the operator to apply before the after operator is applied

after - the operator to apply after the this_ operator is applied

Returns:

a composed operator that first applies the this_ operator and then applies the after operator

Throws:

java.lang.NullPointerException - if this_ is null

java.lang.NullPointerException - if after is null

See Also:

compose(DoubleUnaryOperator, DoubleUnaryOperator)

identity

public static DoubleUnaryOperator identity()

Returns a unary operator that always returns its input argument.

Returns:

a unary operator that always returns its input argument