tell me more icon In the IDE

After running the Ant task, you should see a build successful message in the JDeveloper Log window.

ant log window

If there are errors, you should verify that your database is running (try connecting through SQL*Plus), and that the values you provided in the file are correct. Also, make sure that the DBA user you specified has the CREATE USER privilege. 

Copyright © 1997, 2009, Oracle. All rights reserved.

false ,,,,,,,,,,,,,,,