Question

I want to make java code that does only this:

Login to the ‘xe’ connection in Oracle 11g database. That’s all.
How can do it ?

EDIT:
yes, i was using JDBC, but unable to login to that connection. My url is jdbc:oracle:thin:@//localhost:1521/xe, username = sys and password = 123456 for the xe or sys connection. Then why can’t i login to that connection ?

EDIT:

I am very sorry, I forgot to add that I see another error besides the 1st one, i.e.

SQLException: ORA-28009: connection as SYS should be as SYSDBA or SYSOPER

This is followed by-

Exception in thread "main" java.lang.NullPointerException

Answer 1

If you want to connect as SYS you have to use sys as sysdba

So in your java code try like the following code

    String url = "jdbc:oracle:thin:@//localhost:1521:xe";
    String username = "sys as sysdba";
    String password = "123456";
Connection connection= DriverManager.getConnection(url, username, password);

Regards