ReNcOoR

import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class lap2 extends JFrame implements ActionListener{

        private JTextField t, t1, t2, t3, t4, t5;
        private JLabel l, l1, l2, l3, l4, l5;
        private JButton boton;
        private static int cont;
        private static int cont2 = 0;
        private laptop array[] = new laptop[cont];



        public lap2 (){

            super("Example_Class");
            this.setSize(400, 400);
            centrarventana();
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            this.setResizable(false);
            this.setLayout(null);

            creargui();






        }

        private void creargui (){

            t  = new JTextField();
            t1 = new JTextField();
            t2 = new JTextField();
            t3 = new JTextField();
            t4 = new JTextField();
            t5 = new JTextField();

            l  = new JLabel("Objetos Creados");
            l1 = new JLabel("Numero Objetos Laptop");
            l2 = new JLabel("Marca");
            l3 = new JLabel("Modelo");
            l4 = new JLabel("Tamaño Memoria");
            l5 = new JLabel("Precio");

            boton = new JButton("Listo");

            this.add(l);
            l.setBounds(230, 100, 150, 20 );
            this.add(t);
            t.setBounds(260, 130, 40, 25);
            this.add(l1);
            l1.setBounds(10, 20, 150, 20);
            this.add(t1);
            t1.setBounds(10, 50, 70, 25);
            this.add(l2);
            l2.setBounds(10, 80, 100, 20);
            this.add(t2);
            t2.setBounds(10, 110, 150, 25);
            this.add(l3);
            l3.setBounds(10, 140, 100, 20);
            this.add(t3);
            t3.setBounds(10, 170, 150, 25);
            this.add(l4);
            l4.setBounds(10, 200, 100, 20);
            this.add(t4);
            t4.setBounds(10, 230, 150, 25);
            this.add(l5);
            l5.setBounds(10, 260, 100, 20);
            this.add(t5);
            t5.setBounds(10, 290, 150, 25);

            this.add(boton);
            boton.setBounds(205, 220, 150, 30);
            boton.addActionListener(this);

        }

        private void contenedor (){

            cont = Integer.parseInt(t1.getText());

            for (int i = 0; i < cont; i++){