DoubleUnaryOperator (Java Platform SE 8 ) (original) (raw)

• 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
Since:
1.8
See Also:
UnaryOperator

• • Method Summary

  All Methods Static Methods Instance Methods Abstract Methods Default Methods

  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 after operator to the result.
  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.

• • 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](../../../java/util/function/DoubleUnaryOperator.html "interface in java.util.function") compose([DoubleUnaryOperator](../../../java/util/function/DoubleUnaryOperator.html "interface in java.util.function") 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](../../../java/lang/NullPointerException.html "class in java.lang")` \- if before is null  
     See Also:  
     [andThen(DoubleUnaryOperator)](../../../java/util/function/DoubleUnaryOperator.html#andThen-java.util.function.DoubleUnaryOperator-)  
     * #### andThen  
     default [DoubleUnaryOperator](../../../java/util/function/DoubleUnaryOperator.html "interface in java.util.function") andThen([DoubleUnaryOperator](../../../java/util/function/DoubleUnaryOperator.html "interface in java.util.function") 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](../../../java/lang/NullPointerException.html "class in java.lang")` \- if after is null  
     See Also:  
     [compose(DoubleUnaryOperator)](../../../java/util/function/DoubleUnaryOperator.html#compose-java.util.function.DoubleUnaryOperator-)  
     * #### identity  
     static [DoubleUnaryOperator](../../../java/util/function/DoubleUnaryOperator.html "interface in java.util.function") identity()  
     Returns a unary operator that always returns its input argument.  
     Returns:  
     a unary operator that always returns its input argument

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