json and regular class

package Main;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;

import org.json.JSONArray;
import org.json.JSONObject;

public class Tester{
    private static Connection db;
    private static PreparedStatement stmt;
    final static String URL = "jdbc:mysql://127.0.0.1:3306/";
    final static String DB_NAME = "hackeru";
    final static String USER_NAME = "root";
    final static String USER_PASS = "";
    //private static String aBrandName[]= {"ZTE","Nokia","OPO","HTC"};
    //private static int aPrice[] = {900,2500,2900,3250};
    //private static int aQty[] = {5,3,2,7};
    public static void main(String[] args) throws Exception {
        // creating our connection string

        // creating a connection to our database
        db = DriverManager.getConnection(URL + DB_NAME, USER_NAME, USER_PASS);
        //create table for the first time, and if the table exists do not create it....
        //createTable();

        //insert first data to our mySQL with JDBC
        //insertFirstDemo();

        //insert data in secured way.... (no SQL injection)
        //saferInsert();

        //insert array of data....
        /*
        for (int counter=0;counter<aBrandName.length;counter+=1)
        {
            saferInsert2(aBrandName[counter], aPrice[counter], aQty[counter]);
        }
        System.out.println("I was finished, yeah MAN!");
        */
        getData();
    }

    private static void getData() throws Exception
    {
        //create sql statment
        String sql="SELECT * FROM phones";
        //get result from mySQL to an object called ResultSet
        ResultSet result=db.prepareStatement(sql).executeQuery();
        //System.out.println(result.toString());
        Vector <myPhones> myVec = new Vector<>();
        for (result.first();!result.isAfterLast();result.next())
        {
            myVec.add(new myPhones(
                    result.getString("name"),
                    result.getInt("price"),
                    result.getInt("qty")
                    ));
        }

        for (myPhones item:myVec)
        {
            System.out.println(item);
        }

        /*
        JSONArray jsonResult = new JSONArray();
        for (result.first();!result.isAfterLast();result.next())
        {
            jsonResult.put(new JSONObject()
                    .put("name", result.getString("name"))
                    .put("price", result.getInt("price"))
                    .put("qty", result.getInt("qty"))
                    );
        }

        System.out.println(jsonResult.toString());
        */
    }

    private static void saferInsert2(String brandName, int price, int qty) throws Exception
    {
        //assume there is a table phones with name,price,qty    1 2 3
                String sql="INSERT INTO phones (name,price,qty) VALUES (?,?,?)";
                PreparedStatement stmt = db.prepareStatement(sql); //prepare statement with 3 parms
                stmt.setString(1, brandName); //bind string param as first param (first question mark)
                stmt.setInt(2, price); //bind int param as second param (second question mark)
                stmt.setInt(3, qty); //bin int param as third param (becuase there is no f*** way that i will buy again apple, me want android
                stmt.execute();
    }

    private static void saferInsert() throws Exception
    {
        //assume there is a table phones with name,price,qty    1 2 3
        String sql="INSERT INTO phones (name,price,qty) VALUES (?,?,?)";
        PreparedStatement stmt = db.prepareStatement(sql); //prepare statement with 3 parms
        stmt.setString(1, "Iphone 7 plus"); //bind string param as first param (first question mark)
        stmt.setInt(2, 4300); //bind int param as second param (second question mark)
        stmt.setInt(3, 1); //bin int param as third param (becuase there is no f*** way that i will buy again apple, me want android
        stmt.execute();
    }

    private static void insertFirstDemo() {
        // create a SQL command.
        String sql = "INSERT INTO chocos (name) "
                + "values ('Para'),('Milka'),('Oreo'),('Bueno'),"
                + "('Ferror Roche');";

        try {
            // prepare statement for given SQL
            stmt = db.prepareStatement(sql);
            // execute the statement
            stmt.execute();

        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("Data was inserted");
    }

    private static void createTable() {
        // create a SQL command.
        String sql = "CREATE TABLE IF NOT EXISTS chocos" + " (id INT PRIMARY KEY AUTO_INCREMENT,"
                + " name VARCHAR (16) NOT NULL);";

        try {
            // prepare statement for given SQL
            stmt = db.prepareStatement(sql);
            // execute the statement
            stmt.execute();

        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        System.out.println("Table was created");
    }

    private static String strValues(String[] strs)
    {
        StringBuilder values = new StringBuilder();
        char del = ' ';
        for (String str:strs)
        {
            values.append(del).append("('").append(str).append("')");
            if (del == ' ') del=',';
        }
        return values.toString();
    }
}