Erro em conexao Postgres

import java.sql.DriverManager;

import java.sql.Connection;

import java.sql.SQLException;

public class BD1 {

public static void main(String[] argv) {

System.out.println(“Checking if Driver is registered with DriverManager.”);

try {

Class.forName(“org.postgresql.Driver”);

} catch (ClassNotFoundException cnfe) {

System.out.println(“Couldn’t find the driver!”);

System.out.println(“Let’s print a stack trace, and exit.”);

cnfe.printStackTrace();

System.exit(1);

}

try {

// The second and third arguments are the username and password,

// respectively. They should be whatever is necessary to connect

// to the database.

c = DriverManager.getConnection(“jdbc:postgresql://localhost/dellstore2”,

“dellstore2”, “dellstore2”);

} catch (SQLException se) {

System.out.println(“Couldn’t connect: print out a stack trace and exit.”);

se.printStackTrace();

System.exit(1);

}

if (c != null)

System.out.println(“Hooray! We connected to the database!”);

else

System.out.println(“We should never get here.”);

}

}

e obtenho o seguintre erro:

Checking if Driver is registered with DriverManager.

Couldn’t find the driver!

Let’s print a stack trace, and exit.

java.lang.ClassNotFoundException: org.postgresql.Driver

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at BD1.main(BD1.java:10)