JDBC in PostgreSql for Linux

I am running a Java application on Linux which connects to the Postgresql on
Linux using jdbcodbc bridge.
But this is the error I am getting :

sun.jdbc.odbc.JdbcOdbcDriver
java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
   at 0x4028115f: java.lang.Throwable.Throwable(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x402740d2: java.lang.Exception.Exception(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x402737a8:
java.lang.ClassNotFoundException.ClassNotFoundException(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x4030b2be: java.net.URLClassLoader.findClass(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x402606d7: gnu.gcj.runtime.VMClassLoader.findClass(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x40272cc7: java.lang.ClassLoader.loadClass(java.lang.String, boolean)
(/usr/lib/libgcj.so.3)
   at 0x40260e09: _Jv_FindClass(_Jv_Utf8Const, java.lang.ClassLoader)
(/usr/lib/libgcj.so.3)
   at 0x4025d1fd: java.lang.Class.forName(java.lang.String, boolean,
java.lang.ClassLoader) (/usr/lib/libgcj.so.3)
   at 0x4025d2bf: java.lang.Class.forName(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x4039d347: ffi_call_SYSV (/usr/lib/libgcj.so.3)
   at 0x4039d307: ffi_raw_call (/usr/lib/libgcj.so.3)
   at 0x40248528: _Jv_InterpMethod.continue1(_Jv_InterpMethodInvocation)
(/usr/lib/libgcj.so.3)
   at 0x40248e34: _Jv_InterpMethod.run(ffi_cif, void, ffi_raw,
_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.3)
   at 0x40246424: _Jv_InterpMethod.run_normal(ffi_cif, void, ffi_raw, void)
(/usr/lib/libgcj.so.3)
   at 0x4039d1bc: ?? (??:0)
   at 0x4025b308: gnu.gcj.runtime.FirstThread.call_main()
(/usr/lib/libgcj.so.3)
   at 0x402c60b1: gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.3)
   at 0x40267fdc: _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.3)
   at 0x4023478c: _Jv_RunMain(java.lang.Class, byte const, int, byte const,
boolean) (/usr/lib/libgcj.so.3)
   at 0x08048900: ?? (??:0)
   at 0x420158d4: ?? (??:0)
   at 0x080486c1: ?? (??:0)

I have also tried running a Java application using the Native JDBC Driver.
I get the following error :
Driver not found for URL: jdbc:postgresql@10.100.102.31:5432:notes
java.sql.SQLException: Driver not found for URL:
jdbc:postgresql@10.100.102.31:5432:notes
   at 0x4028115f: java.lang.Throwable.Throwable(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x402740d2: java.lang.Exception.Exception(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x40316294: java.sql.SQLException.SQLException(java.lang.String,
java.lang.String, int) (/usr/lib/libgcj.so.3)
   at 0x40316244: java.sql.SQLException.SQLException(java.lang.String)
(/usr/lib/libgcj.so.3)
   at 0x40316102: java.sql.DriverManager.getConnection(java.lang.String,
java.util.Properties) (/usr/lib/libgcj.so.3)
   at 0x4031603a: java.sql.DriverManager.getConnection(java.lang.String,
java.lang.String, java.lang.String) (/usr/lib/libgcj.so.3)
   at 0x4039d347: ffi_call_SYSV (/usr/lib/libgcj.so.3)
   at 0x4039d307: ffi_raw_call (/usr/lib/libgcj.so.3)
   at 0x40248528: _Jv_InterpMethod.continue1(_Jv_InterpMethodInvocation)
(/usr/lib/libgcj.so.3)
   at 0x40248e34: _Jv_InterpMethod.run(ffi_cif, void, ffi_raw,
_Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.3)
   at 0x40246424: _Jv_InterpMethod.run_normal(ffi_cif, void, ffi_raw, void)
(/usr/lib/libgcj.so.3)
   at 0x4039d1bc: ?? (??:0)
   at 0x4025b308: gnu.gcj.runtime.FirstThread.call_main()
(/usr/lib/libgcj.so.3)
   at 0x402c60b1: gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.3)
   at 0x40267fdc: _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.3)
   at 0x4023478c: _Jv_RunMain(java.lang.Class, byte const, int, byte const,
boolean) (/usr/lib/libgcj.so.3)
   at 0x08048900: ?? (??:0)
   at 0x420158d4: ?? (??:0)
   at 0x080486c1: ?? (??:0)

Can you help me?Do you have any contact number?
Do you have any url links that might be helpful to me?
Or any other contact number in India or abroad for PostgreSql?
Please do reply me asap.

Thanks and Regards,
Kallol Nandi,
Systems Analyst,
Indus Software - A Division of R Systems International Ltd.,
Tidel Park, Taramani, Chennai-600113, India.
Phone: +91-44-22540014/6 Extn: 209
Fax: +91-44-22540017
Email: Kallol.Nandi@indussoft.com
Visit us @ http://www.indussoft.com/
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