The optional Ant tasks are included at:
JC_CLASSIC_HOME\lib\jctasks.jar
Note:
Use of the additional Ant tasks described in this section is strictly optional and is not formally supported, nor has it been fully tested.
Be sure Ant is configured as described in Downloading the Development Kit.
Copy the file JC_CLASSIC_HOME\lib\jctasks.jar to a directory that serves as your Ant tasks home directory.
Add the jctasks.jar file to your classpath or put it into the Ant-Home-Path\lib directory to be automatically be picked up when Ant is run.
Where:
Ant-Home-Path is the path to the Ant installation.
The value of the ANT_HOME environment variable is properly configured to run Ant (see Downloading the Development Kit).