ODBC connection

import java.sql.*;
import java.util.*;
public class OJDBCAvi
{

    public static void main(String args[])throws Exception
    {
        String sql="insert into year values(3,'avi1')";
        Class c=Class.forName("oracle.jdbc.driver.OracleDriver");
        Driver d=(Driver)c.newInstance();
        String s="jdbc:oracle:thin:@localhost:1521:ORCL";
        Properties p=new Properties();
        p.put("user","scott");
        p.put("password","tiger");
        Connection con=d.connect(s,p);
        Statement st=con.createStatement();
        st.executeUpdate(sql);
        con.close();
        System.out.println("table details are saved");
    }
}

This is my ODBC program,bt here I am getting error i.e Exception in Thread "main" java.sql.SQLException:Io Exception : The network Adapter could not establish the connection.