ReNcOoR

import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.*;
import java.awt.*;

import javax.swing.*;



public class pruebalaptop extends JFrame implements ActionListener{


        private JLabel label;
        private JButton boton, boton2;
        private lap2 f = new lap2();
        private lap3 g = new lap3();

        public pruebalaptop (){

            super("Example_Class");
            this.setSize(450, 200);
            centrarventana();
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            this.setResizable(true);
            this.setLayout(null);

            creargui();


        }

        private void creargui (){

            label = new JLabel("Bienvenido selecciona un boton");
            boton = new JButton("Crear objetos laptop");
            boton2 = new JButton("Modificar objetos laptop");

            this.add(label);
            label.setBounds(140, 40, 200, 25);
            this.add(boton);
            boton.setBounds(10, 90, 200, 25);
            this.add(boton2);
            boton2.setBounds(230, 90, 200, 25);

            boton.addActionListener(this);
            boton2.addActionListener(this);



        }

        private void centrarventana (){

            Dimension pantalla = Toolkit.getDefaultToolkit().getScreenSize();

            Dimension ventana = getSize();

            setLocation((pantalla.width - ventana.width) /2, (pantalla.height - ventana.height) /2);
        }


        public static void main(String[] args) {


            pruebalaptop vp = new pruebalaptop();
            vp.setVisible(true);





        }




        public void actionPerformed(ActionEvent e) {

            if (e.getSource() == boton)
                f.setVisible(true);
            else if (e.getSource() == boton2)
                g.setVisible(true);
        }

    }