Little Notes
  1. When you want to test your Oracle DB is running on your machine, open command line and enter:
    connect sys/password as sysdba
    If you get message like this:
    connected to an idle instance
    This means your Oracle DB is not running. From Starts/Administrative Tools/Services/ find OracleDB in your services list. With right click restart it again.
  2. When you can connect your OracleXE Database home page from the link:
    http://127.0.0.1:8080/apex
    but can’t connect from:
    http://yourpcipaddress:8080/apex
    Connect your sysdba account from command line and execute the code below:
    exec dbms_xdb.setListenerLocalAccess(l_access=>FALSE);