Error facing while trying to connect Oracle XE

[Rudra Nath]

I installed Oracle XE in my PC and tried to connect to Oracle using JDBC.
I am getting error:"listener does not currently know of service requested in connect descriptor", while trying to connect to Oracle XE using JDBC.
Please help.
Please find below code snippet, and TNSNAMES.ORA for the database

String oracleURL = "jdbc:oracle:thin:@Rudre-PC" +
		  ":1521";

		  String dbName = "Rudre";
		 
		  try {
			  Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
			  //Connection  conn = DriverManager.getConnection(url+dbName);
			  Connection  conn =  DriverManager.getConnection(oracleURL, "SYSTEM", "ibm");
			  System.out.println("Connected to the database");
			  conn.close();
			  System.out.println("Disconnected from database");
			  } catch (Exception e) {
			  e.printStackTrace();
			  }


tnsnames.ora
XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = Rudre-PC)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

error:
INFO: Jk running ID=0 time=0/64 config=null
29 Apr, 2012 1:00:23 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 8264 ms
java.sql.SQLException: Listener refused the connection with the following error:

ORA-12514, TNS:listener does not currently know of service requested in connect
descriptor
The Connection descriptor used by the client was:
Rudre-PC:1521

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:111)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:260)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:386)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:
413)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:164)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:34)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:752)
at java.sql.DriverManager.getConnection(DriverManager.java:582)

[Wendy Gibbons]

and you can connect using these values from the oracle client (SQLPLUS or something better if they now supply that)?

I did a quick search out there and the actions a website i trust suggested were

Wait a moment and try to connect a second time.

Check which services are currently known by the listener by executing: lsnrctl services

If an easy connect naming connect identifier was used, check that the service name specified is a service known by the listener.

Check for an event in the listener.log file.

[Wendy Gibbons]

And welcome to JavaRanch Rudra Nath

[chris webster]

Oracle XE only gives you one database, and its name is "XE".

I think your connection string should look like this:

jdbc:oracle:thin:@Rudre-PC:1521:xe

If you are working on a local machine, you could also try changing the machine name in your JDBC string and your TNSNAMES to be "localhost" (or the default TCP loopback address 127.0.0.1).

[Rudra Nath]

Many Thanks Chris.
Your solution helped me!!!
Thanks again!!!