**************************************كلاس التصال**********************************************

package petrotesting;

import java.sql.Connection;
import java.sql.DriverManager;
import javax.swing.JOptionPane;
public class Connect {
    Connection con=null;
    public Connection connect(){
        try{
        Class.forName("com.mysql.jdbc.Driver");
        con=DriverManager.getConnection("jdbc:mysql://localhost/petrotesting","root","");
        JOptionPane.showMessageDialog(null,"tconnect");
        }catch(Exception e){
             JOptionPane.showMessageDialog(null,"tconnectchi");
        }
        return con;

    }
}


الكلاس الرئيسي****************************************************************************
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package petrotesting;


/**
 *
 * @author TEAM 161 User
 */
public class Petrotesting {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
       Connect c= new Connect();
       c.connect();
    }

}