Start the Update Tool.
Expand the GlassFish v3 node.
Select the Available Add-ons node.
From the list, select the Apache Ant Build Tool checkbox.
Accept the license agreement.
After installation, Apache Ant appears in the list of installed components. The tool is installed in the as-install-parent/ant directory.
To use the ant command, add as-install/ant/bin to your PATH environment variable.