Package org.apache.poi.util

Top-level util package are classes that are useful throughout the project.

See:
Description

Interface Summary

DelayableLittleEndianOutput	Implementors of this interface allow client code to 'delay' writing to a certain section of a data output stream. A typical application is for writing BIFF records when the size is not known until well after the header has been written.
FixedField	behavior of a field at a fixed location within a byte array
LittleEndianConsts	a repository for constants shared by classes within this package
LittleEndianInput
LittleEndianOutput

Class Summary

ArrayUtil	Utility classes for dealing with arrays.
BinaryTree	Red-Black tree-based implementation of Map.
BitField	Manage operations dealing with bit-mapped fields.
BitFieldFactory	Returns immutable Btfield instances.
BlockingInputStream	Implementation of a BlockingInputStream to provide data to RawDataBlock that expects data in 512 byte chunks.
ByteField	representation of a byte (8-bit) field at a fixed location within a byte array
CloseIgnoringInputStream	A wrapper around an InputStream, which ignores close requests made to it.
CommonsLogger	A logger class that strives to make it as easy as possible for developers to write log calls, while simultaneously making those calls as cheap as possible by performing lazy evaluation of the log message.
DrawingDump	Dump out the aggregated escher records
FontMetricsDumper
HexDump	dump data in hexadecimal format; derived from a HexDump utility I wrote in June 2001.
HexRead	Utilities to read hex from files.
IdentifierManager	24.08.2009
IntegerField	representation of an integer (32-bit) field at a fixed location within a byte array
IntList	A List of int's; as full an implementation of the java.util.List interface as possible, with an eye toward minimal creation of objects the mimicry of List is as follows: if possible, operations designated 'optional' in the List interface are attempted wherever the List interface refers to an Object, substitute int wherever the List interface refers to a Collection or List, substitute IntList the mimicry is not perfect, however: operations involving Iterators or ListIterators are not supported remove(Object) becomes removeValue to distinguish it from remove(int index) subList is not supported
IntMapper<T>	A List of objects that are indexed AND keyed by an int; also allows for getting the index of a value in the list
IOUtils
LittleEndian	a utility class for handling little-endian numbers, which the 80x86 world is replete with.
LittleEndianByteArrayInputStream	Adapts a plain byte array to LittleEndianInput
LittleEndianByteArrayOutputStream	Adapts a plain byte array to LittleEndianOutput
LittleEndianInputStream	Wraps an InputStream providing LittleEndianInput This class does not buffer any input, so the stream read position maintained by this class is consistent with that of the inner stream.
LittleEndianOutputStream
LongField	representation of a long (16-bit) field at a fixed location within a byte array
LZWDecompresser	This class provides common functionality for the various LZW implementations in the different file formats.
NullLogger	A logger class that strives to make it as easy as possible for developers to write log calls, while simultaneously making those calls as cheap as possible by performing lazy evaluation of the log message.
OOXMLLite	Build a 'lite' version of the ooxml-schemas.jar
PackageHelper	Provides handy methods to work with OOXML packages
POILogFactory	Provides logging without clients having to mess with configuration/initialization.
POILogger	A logger interface that strives to make it as easy as possible for developers to write log calls, while simultaneously making those calls as cheap as possible by performing lazy evaluation of the log message.
ShortField	representation of a short (16-bit) field at a fixed location within a byte array
ShortList	A List of short's; as full an implementation of the java.util.List interface as possible, with an eye toward minimal creation of objects the mimicry of List is as follows: if possible, operations designated 'optional' in the List interface are attempted wherever the List interface refers to an Object, substitute short wherever the List interface refers to a Collection or List, substitute ShortList the mimicry is not perfect, however: operations involving Iterators or ListIterators are not supported remove(Object) becomes removeValue to distinguish it from remove(short index) subList is not supported
StringUtil	Title: String Utility Description: Collection of string handling utilities Note - none of the methods in this class deals with ContinueRecords.
StringUtil.StringsIterator	An Iterator over an array of Strings.
SystemOutLogger	A logger class that strives to make it as easy as possible for developers to write log calls, while simultaneously making those calls as cheap as possible by performing lazy evaluation of the log message.
TempFile	Interface for creating temporary files.
Units

Exception Summary

LittleEndian.BufferUnderrunException	Exception to handle buffer underruns
RecordFormatException	A common exception thrown by our binary format parsers (especially HSSF and DDF), when they hit invalid format or data when processing a record.

Annotation Types Summary

Beta	Signifies that a public API (public class, method or field) is subject to incompatible changes, or even removal, in a future release.
Internal	Program elements annotated @Internal are intended for POI internal use only.

Package org.apache.poi.util Description

Top-level util package are classes that are useful throughout the project. These classes are generally generic enough to be useful in any project and should be contributed elsewhere!

Related Documentation

For overviews, tutorials, examples, guides, and tool documentation, please see:

• Apache POI Project