Tip : dbms_java

By executing the following 2 statements in your session :

SET SERVEROUTPUT ON SIZE 1000000;
CALL DBMS_JAVA.SET_OUTPUT (1000000);

All the output of the System.out.println command in your stored procedures will be shown in your serveroutput. This gives you simple and fast way to debug your procedure like any other pl/sql procedure. It's jus like you would use the dbms_output.put_line proc.