Java Database Connectivity (JDBC)

I have a program

import java.sql.*;
import java.net.*;
//import java.oracle.sql.*;
//import java.oracle.jdbc.Driver.*;

  public class Oracle1
  {
    public static void main(String[] args)
    {
      try
      {
        DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
        Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.1.5:1521:nadir","system","nadir");
        Statement stmt = conn.createStatement();
        System.out.println("Connected to Oracle!!!!");
        stmt.close();
        conn.close();
      } catch (Exception e) {
        System.out.println("ERROR : " + e);
        e.printStackTrace(System.out);
      }
    }
  }

I also set the classpath
Iam trying to connect o oracle database. I am getting the following error

ERROR : java.sql.SQLException: Io exception: Got minus one from a read call
java.sql.SQLException: Io exception: Got minus one from a read call
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:184)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:226)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:339)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:371)

at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:442)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at FinalMobile.<init>(FinalMobile.java:178)
at FinalMobile.main(FinalMobile.java:1263)
Io exception: Got minus one from a read call


Please Help