# Package org.apache.commons.math.util

Convenience routines and common data structures used throughout the commons-math library.

See: Description

Interface Summary
Interface | Description
--- | ---
DoubleArray | Provides a standard interface for double arrays.
NumberTransformer | Subclasses implementing this interface can transform Objects to doubles.

Class Summary
Class | Description
--- | ---
BigReal | Arbitrary precision decimal number.
BigRealField | Representation of real numbers with arbitrary precision field.
BigRealField.LazyHolder | Holder for the instance.
CompositeFormat | Base class for formatters of composite objects (complex numbers, vectors ...).
ContinuedFraction | Provides a generic means to evaluate continued fractions.
DefaultTransformer | A Default NumberTransformer for java.lang.Numbers and Numeric Strings.
FastMath | Faster, more accurate, portable alternative to `StrictMath`.
MathUtils | Some useful additions to the built-in functions in `Math`.
MultidimensionalCounter | Converter between unidimensional storage structure and multidimensional conceptual structure.
OpenIntToDoubleHashMap | Open addressed map from int to double.
OpenIntToFieldHashMap<T extends FieldElement<T>> | Open addressed map from int to FieldElement.
ResizableDoubleArray | A variable length `DoubleArray` implementation that automatically handles expanding and contracting its internal storage array as elements are added and removed.
TransformerMap | This TansformerMap automates the transformation of mixed object types.

Enum Summary
Enum | Description
--- | ---
MathUtils.OrderDirection | Specification of ordering direction.

## Package org.apache.commons.math.util Description

Convenience routines and common data structures used throughout the commons-math library.