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| Introduction to Ant |
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Ant is a platform-independent build tool that
specially supports for the Java programming
language. It is written purely in Java. Ant is a
powerful technique that helps the developers
to convert their developmental structures in
deployment structures.
It allows the developer to automate the
repeated process involved in the development
of J2EE application. Developers can easily write
the script to automate the build process like
compilation, archiving and deployment.
A build process is an essential part of any
development cycle because it removes the gap
between the development, integration, and test
environments. It also helps to remove other
issues while deploying such as compilation,
classpath, or properties that cost many
projects time and money. Ant is a free tool
under the GNU License and is freely available
at http://jakarta.apache.org/ant/.
There are some useful commands described in
the table. These commands are built in the Ant
distribution.
| Command |
Description |
| Ant |
Used to execute another ant
process from within the
current one. |
| Copydir |
Used to copy an entire
directory. |
| Copyfile |
Used to copy a single file. |
| Delete |
Deletes either a single file or all
files in a specified directory and
its sub-directories. |
| Deltree |
Deletes a directory with all its
files and subdirectories. |
| Get |
Gets a file from an URL. |
| Jar |
Jars a set of files. |
| Java |
Executes a Java class within
the running (Ant) VM or forks
another VM if specified. |
| Javac |
Compiles a source tree within
the running (Ant) VM. |
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| Mkdir |
Makes a directory. |
| Property |
Sets a property (by name and
value), or set of properties
(from file or resource) in the
project. |
| Rmic |
Runs the rmic compiler for a
certain class. |
| Exec |
Executes a system command.
When the os attribute is
specified, then the command
isonly executed when Ant is
run on one of the specified
operating systems. |
Ant Data Types
There are some data types used by the ant
tasks. These are described in a table given
below:
| Data Types |
Description |
| Argument |
It passes command-line
arguments to programs that
you invoke from an Ant
buildfile. |
| Environment |
It specifies environment
variables to pass to an
external command or
program that you execute
from an Ant buildfile. |
| Filelist |
It defines a named list of files
that do not necessarily need
to actually exist. |
| Fileset |
It defines a named list of files
that must actually exist. |
| Patternset |
It groups a set of patterns
together. |
| Filterset |
It groups a set of filters
together. |
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Jan 2008 | Java Jazz Up | 39 |
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