| Base64Converter | BASE 64 encoding of a String or an array of bytes. | 
| ChainedMapper | A ContainerMapperthat chains the results of the first
 nestedFileNameMappers into sourcefiles for the second,
 the second to the third, and so on, returning the resulting mapped
 filenames from the last nestedFileNameMapper. | 
| ClasspathUtils | Offers some helper methods on the Path structure in ant. | 
| ClasspathUtils.Delegate | Delegate that helps out any specific ProjectComponent that needs
 dynamic classloading. | 
| CollectionUtils | Deprecated. | 
| CollectionUtils.EmptyEnumeration<E> | Deprecated. | 
| CompositeMapper | A ContainerMapperthat unites the results of its constituentFileNameMappers into a single set of result filenames. | 
| ConcatFileInputStream | Special InputStreamthat will
 concatenate the contents of an array of files. | 
| ConcatResourceInputStream | Special InputStreamthat will
 concatenate the contents of Resources from a single ResourceCollection. | 
| ContainerMapper | A FileNameMapperthat contains
 otherFileNameMappers. | 
| DateUtils | Helper methods to deal with date/time formatting with a specific
 defined format (ISO8601 )
 or a correct pluralization of elapsed time in minutes and seconds. | 
| DeweyDecimal | Utility class to contain version numbers in "Dewey Decimal"
 syntax. | 
| DOMElementWriter | Writes a DOM tree to a given Writer. | 
| DOMElementWriter.XmlNamespacePolicy | Whether namespaces should be ignored for elements and attributes. | 
| DOMUtils | Some utility methods for common tasks when building DOM trees in memory. | 
| FileTokenizer | Class to read the complete input into a string. | 
| FileUtils | This class also encapsulates methods which allow Files to be
 referred to using abstract path names which are translated to native
 system file paths at runtime as well as copying files or setting
 their last modification time. | 
| FirstMatchMapper | A ContainerMapperthat returns the results of its
 first constituentFileNameMappers that matches. | 
| FlatFileNameMapper | Implementation of FileNameMapper that always returns the source
 file name without any leading directory information. | 
| GlobPatternMapper | Implementation of FileNameMapper that does simple wildcard pattern
 replacements. | 
| IdentityMapper | Implementation of FileNameMapper that always returns the source file name. | 
| IdentityStack<E> | Identity Stack. | 
| JavaEnvUtils | A set of helper methods related to locating executables or checking
 conditions of a given Java installation. | 
| JAXPUtils | Collection of helper methods that retrieve a ParserFactory or
 Parsers and Readers. | 
| KeepAliveInputStream | Class that can be used to wrap System.inwithout getting anxious about any client closing the stream. | 
| KeepAliveOutputStream | Class that can be used to wrap System.outandSystem.errwithout getting anxious about any client closing the stream. | 
| LayoutPreservingProperties | A Properties collection which preserves comments and whitespace
 present in the input stream from which it was loaded. | 
| LazyFileOutputStream | Class that delays opening the output file until the first bytes
 shall be written or the method  open has been invoked
 explicitly. | 
| LazyHashtable<K,V> | Deprecated. | 
| LeadPipeInputStream | Special PipedInputStreamthat will not die
 when the writingThreadis no longer alive. | 
| LineOrientedOutputStream | Invokes  processLine whenever a full line has
 been written to this stream. | 
| LineOrientedOutputStreamRedirector | Output stream which buffer and redirect a stream line by line. | 
| LineTokenizer | class to tokenize the input as lines separated
 by \r (mac style), \r\n (dos/windows style) or \n (unix style) | 
| LinkedHashtable<K,V> | Subclass of Hashtable that wraps a LinkedHashMap to provide
 predictable iteration order. | 
| LoaderUtils | ClassLoader utility methods | 
| MergingMapper | Implementation of FileNameMapper that always returns the same
 target file name. | 
| Native2AsciiUtils | Contains helper methods for Ant's built-in implementation of native2ascii. | 
| OutputStreamFunneler | Manages a set of OutputStreams to
 write to a single underlying stream, which is
 closed only when the last "funnel"
 has been closed. | 
| PackageNameMapper | Maps directory name matches into a dotted package name. | 
| PermissionUtils | Contains helper methods for dealing with PosixFilePermissionor the traditional Unix mode representation of
 permissions. | 
| ProcessUtil | Process Utilities | 
| PropertyOutputStream | OutputStreamthat writes an Ant property.
 | 
| ProxySetup | Code to do proxy setup. | 
| ReaderInputStream | Adapts a Readeras anInputStream. | 
| ReflectUtil | Utility class to handle reflection on java objects. | 
| ReflectWrapper | Utility class to handle reflection on java objects. | 
| RegexpPatternMapper | Implementation of FileNameMapper that does regular expression
 replacements. | 
| ResourceUtils | This class provides utility methods to process Resources. | 
| RetryHandler | A simple utility class to take a piece of code (that implements
 Retryableinterface) and executes that with possibility to
 retry the execution in case of IOException. | 
| ScriptFixBSFPath | A class to modify a classloader to
 support BSF language support. | 
| ScriptRunner | Deprecated. | 
| ScriptRunnerBase | This is a common abstract base case for script runners. | 
| ScriptRunnerCreator | This is a helper class used by ScriptRunnerHelper to
 create a ScriptRunner based on a classloader and on a language. | 
| ScriptRunnerHelper | A class to help in creating, setting and getting script runners. | 
| SourceFileScanner | Utility class that collects the functionality of the various
 scanDir methods that have been scattered in several tasks before. | 
| SplitClassLoader | Specialized classloader for tasks that need finer grained control
 over which classes are to be loaded via Ant's classloader and which
 should not even if they are available. | 
| StreamUtils |  | 
| StringTokenizer | Class to tokenize the input as areas separated
 by white space, or by a specified list of
 delim characters. | 
| StringUtils | A set of helper methods related to string manipulation. | 
| SymbolicLinkUtils | Deprecated. | 
| TaskLogger | A facade that makes logging nicer to use. | 
| TeeOutputStream | A simple T-piece to replicate an output stream into two separate streams | 
| UnicodeUtil | Contains one helper method to create a backslash u escape | 
| UnPackageNameMapper | Maps dotted package name matches to a directory name. | 
| UUEncoder | UUEncoding of an input stream placed into an OutputStream. | 
| VectorSet<E> | Subclass of Vector that won't store duplicate entries and shows
 HashSet's constant time performance characteristics for the
 contains method. | 
| Watchdog | Generalization of ExecuteWatchdog | 
| WeakishReference | Deprecated. | 
| WeakishReference.HardReference | Deprecated. | 
| WorkerAnt | A worker ant executes a single task in a background thread. | 
| XmlConstants | XML Parser constants, all kept in one place for ease of reuse | 
| XMLFragment | Use this class as a nested element if you want to get a literal DOM
 fragment of something nested into your task/type. |