JDBC DB Connection with Eclipse 3.2 and Oracle 10g Express

JDBC connection problem:

The name of the database is HR.
The server is localhost
The default port is 1521 (or so I'm told). The user name is SYSTEM.
The password is wgb1454.
The driver classname is: oracle.jdbc.OracleDriver The connection URL is: jdbc:oracle:thin:@localhost:1521:HR

The error message is:
"Error while trying to login to datbase; Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor. The connection descriptor used by the client was: localhost:1521:HR"

What is TNS:listener? Where is it located? What is SID? Where is it defined?
How are they related and how can you make them recognize each other in Win XP Pro?

The Oracle product is Oracle 10g Express. The database I'm trying to hit is
the default demo database that comes with the product.

The connection is NOT written in Java, it's created through a GUI in Eclipse 3.2.

Any help would be GREATLY appreciated! Received on Fri Nov 10 2006 - 13:24:42 CST