i'm unable to connect with oracle database

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Java

JDBC

Oracle

when i'm trying to connect with oracle database i got this error

error detected :

oracle.jdbc.driver.OracleDriver
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:186)
	at com.gov.test.main(test.java:21)

instead i have download ojdbc6.jar with JDK 1.7 and oracle10g
and placed it right

my code is :

package com.gov;
 import  java.sql.Connection;
import java.sql.DriverManager;


public class test {


 public static void main(String args[])
 {
  try
  {
   // load oracle driver
  Class.forName("oracle.jdbc.driver.OracleDriver");
  // connect using Thin driver
  Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user","pwd");
  System.out.println("Connected Successfully To Oracle");
  con.close();
  }
  catch(Exception ex)
  {
      System.out.println("error detected : ");
      System.out.println(ex.getMessage());
      ex.printStackTrace();
  }
 }
}