I cant connect to database

Hello
I'm trying to connect to a firebird database, I'm using eclipse, I've downloaded Jaybird, and I want to execute the example included. One of the lines of code is this:
d = new org.firebirdsql.jdbc.FBDriver ();
I don't know so much about this names of Java . What this line really means ?
I would like to known it means that: in the path org/firebird/jbdc there is a file name FBDriver.class.
In fact, I don't know what I have to do beacause this lines give me error.
thanks in advance

Dav1d wrote:
I would like to known it means that: in the path org/firebird/jbdc there is a file name FBDriver.class. It means that the Java runtime should create a new instance of the org.firebird.jdbc.FBDriver and assign a reference to that instance to the variable named 'd'.
In fact, I don't know what I have to do beacause this lines give me error.NoClassDefFoundError? Symbol not found? Both errors indicate that such a class cannot be found. Ensure that the class is present in your build and/or runtime classpath. If that's not the error, please post the full text of the error and accompanying stack trace.
~

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C:\sqplus <enter>
username
password
okey
SQL>...
i can connect, there is no problem.
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Firstly, i was getting the ora-12545 error:
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thanx

result of lsnrctl status:
>>
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 06-ÌUB-2008 22:45
:14
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Produ
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Uptime 0 days 4 hr. 30 min. 51 sec
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Listener Log File E:\oraclexe\app\oracle\product\10.2.0\server\network\l
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>>
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(SID_LIST =
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(PROGRAM = extproc)
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(ORACLE_HOME = E:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
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(CONNECT_DATA =
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Hi all,
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Regards,
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rustam_tj wrote:
Hi all,
We use software which connects to database and runs business process. Today I’ve noticed that user cant connect to database via this software from several hosts. I got error code ORA-20000. I think user has some limitation(in profile) to run software from several hosts(IP addresses) at the one time. Can i change this parameter?
Regards,
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# Generated by Oracle configuration tools.
LISTENER_ORCL =
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(CONNECT_DATA =
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listner.ora
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(SID_NAME = HR84DEV)
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(DESCRIPTION_LIST =
(DESCRIPTION =
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Thanks Nicolas,
Actually, there was a problem with my oracle client installation. I uninstalled it and then installed back again but still, even after following your instructions I get some error.
Here what I did:
Created tnsnames.ora file as below:
HR84DEV =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.1)(PORT = 1521))
(CONNECT_DATA =
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TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 10-FEB-2
012 08:42:03
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
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OK (20 msec)
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C:\Users\Administrator>SET ORACLE_SID=HR84DEV
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SQL*Plus: Release 11.2.0.1.0 Production on Fri Feb 10 08:25:56 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> CONNECT SYSADM/SYSADM@HR84DEV
ERROR:
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But still getting error.
I Googled this error and tried to figure out what the problem is and came across the possible cause which is because I haven't specify that the service should run as a user who is in domain admin group.
well, I am not really sure about this and dont know what user name and password I should enter in OracleserviceHR84DEV-properties-log on-this account.
do I really need to set this?

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