JAVA:Calling a Stored Function using CallableStatement

/* Program to call a function using callable statement. Make sure stored function GETEMPCOUNT is already created in Oracle database before you run this program.
*/
import java.sql.*;
public class EmpCount {
public static void main(String args[]) {
if ( args.length < 1 )
{
System.out.println("EmpCount deptno");
System.exit(1);
}
try { // load oracle thin driver
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:mine", "scott","tiger"); // create a callable statement
CallableStatement cs = con.prepareCall("{?=call GetEmpCount(?)}"); // specify the return type
cs.registerOutParameter(1,Types.INTEGER);
cs.setInt(2, Integer.parseInt( args[0])); // execute EMPCOUNT function
cs.execute(); // display the return value of the function
System.out.println("No.of Employees : " + cs.getInt(1));
cs.close();
con.close();
}
catch(Exception ex)
{ System.out.println("Error : " + ex);
}
} // end of main
} // end of TestConnection