You can change the following preferences on the 
  Ant preference
  page.
| Option | Description | Default | 
|---|---|---|
| Names | Configures the buildfiles that Ant's "-find" emulation searches for. | build.xml | 
| Separate JRE Timeout | The time in milliseconds to wait for communication with the Java virtual machine when running an Ant build in a separate Java runtime environment. | 20000 | 
| Documentation URL | Enables you to browse for the applicable documentation URL. | http://ant.apache.org/manual | 
| Always run new Ant configurations in the same JRE as the workspace | Allows you to automatically always have all new Ant launch configurations set to run in the same JRE as the workspace. | Off | 
| Warn when tools.jar is not on the classpath | Displays a warning when tools.jar is not on the classpath. | On | 
| Show error dialog when Ant build fails | Displays an error message when the Ant build fails. | On | 
| Create problem markers from javacresults | Create warning and error markers from the build results of an Ant javactask. Marker creation
        requires that a console is allocated for the build and that thelistfilesattribute of thejavactask be set to true. | Off | 
| Ant Color Options | Configures the colors of the Ant build output. | Varies by Ant output |