| AntClassLoader | Used to load classes within ant with a different classpath from
 that used to start ant. | 
| AntTypeDefinition | This class contains all the information
 on a particular ant type,
 the classname, adapter and the class
 it should be assignable from. | 
| ArgumentProcessorRegistry |  | 
| BuildEvent | Class representing an event occurring during a build. | 
| ComponentHelper | Component creation and configuration. | 
| DefaultDefinitions | Default definitions. | 
| DefaultLogger | Writes build events to a PrintStream. | 
| DemuxInputStream | Passes input requests to the project object for demultiplexing into
 individual tasks and threads. | 
| DemuxOutputStream | Logs content written by a thread and forwards the buffers onto the
 project object which will forward the content to the appropriate
 task. | 
| Diagnostics | A little diagnostic helper that output some information that may help
 in support. | 
| DirectoryScanner | Class for scanning a directory for files/directories which match certain
 criteria. | 
| ExtensionPoint | An extension point build files can provide as a place where other
 build files can add new dependencies. | 
| IntrospectionHelper | Helper class that collects the methods a task or nested element
 holds to set attributes, create nested elements or hold PCDATA
 elements. | 
| IntrospectionHelper.Creator | creator - allows use of create/store external
 to IntrospectionHelper. | 
| Location | Stores the location of a piece of text within a file (file name,
 line number and column number). | 
| MagicNames | Magic names used within Ant. | 
| Main | Command line entry point into Ant. | 
| NoBannerLogger | Extends DefaultLogger to strip out empty targets. | 
| PathTokenizer | A Path tokenizer takes a path and returns the components that make up
 that path. | 
| Project | Central representation of an Ant project. | 
| ProjectComponent | Base class for components of a project, including tasks and data types. | 
| ProjectHelper | Configures a Project (complete with Targets and Tasks) based on
 a build file. | 
| ProjectHelper.OnMissingExtensionPoint | Possible value for target's onMissingExtensionPoint attribute. | 
| ProjectHelperRepository | Repository of  ProjectHelper found in the classpath or via
 some System properties. | 
| PropertyHelper | Deals with properties - substitution, dynamic properties, etc. | 
| RuntimeConfigurable | Wrapper class that holds the attributes of an element, its children, and
 any text within it. | 
| Target | Class to implement a target object with required parameters. | 
| Task | Base class for all tasks. | 
| TaskAdapter | Uses introspection to "adapt" an arbitrary Bean which doesn't
 itself extend Task, but still contains an execute method and optionally
 a setProject method. | 
| TaskConfigurationChecker | Helper class for the check of the configuration of a given task. | 
| UnknownElement | Wrapper class that holds all the information necessary to create a task
 or data type that did not exist when Ant started, or one which
 has had its definition updated to use a different implementation class. | 
| XmlLogger | Generates a file in the current directory with
 an XML description of what happened during a build. |