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duro@FireMachine:~/java/Ficticia_1$ cat Ficticia.javaimport java.io.*;import java.awt.*;import javax.swing.*;import java.util.*;public class Ficticia{   static public Proveedores[] arrProveedores = new Proveedores[51];   Ficticia(){   }   public static void main(String[] pArgs){     Proveedores objProveedores= new Proveedores();     objProveedores.guiProveedores();   }}duro@FireMachine:~/java/Ficticia_1$ cat Proveedores.javaimport java.util.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.io.*;public class Proveedores{    public String proNit,proEmpresa,proApe,proNom,proTel,proMail,proDir;    public char proSexo;    public Date proNac= new Date();    public void Proveedores(String pproNit,String pproEmpresa,String pproApe,String pproNom,String pproTel,String pproMail,String pproDir,char pproSexo,Date pproNac){        pproNit=pproNit;        proEmpresa=pproEmpresa;        proApe=pproApe;        proNom=pproNom;        proTel=pproTel;        proMail=pproMail;        proDir=pproDir;        proSexo=pproSexo;        proNac=pproNac;    }    public int MaxProveedores(){        int lNum=0;        //Arrays.sort(Ficticia.arrProveedores);        for (int cont=1;cont<=50;cont=cont+1){            if( (Ficticia.arrProveedores[cont])!=null){               lNum=lNum+1;            }        }        return(lNum);    }    public void guiProveedores(){        JFrame frmProveedores = new JFrame();        frmProveedores.addWindowListener(new WindowAdapter(){            public void windowClosing(WindowEvent e){                System.exit(0);            }        });        System.out.println("Primer paso");        JLabel lblTitulo = new JLabel(" Proveedores ");        lblTitulo.setPreferredSize(new Dimension(20,40));        lblTitulo.setHorizontalAlignment(JLabel.CENTER);        lblTitulo.setVerticalAlignment(JLabel.CENTER);        JLabel lblNit = new JLabel("Nit: ");        JLabel lblEmpresa = new JLabel("Nombre de la empresa: ");        JLabel lblApe = new JLabel("Apellidos del propietario: ");        JLabel lblNom = new JLabel("Nombres del propietario: ");        JLabel lblTel = new JLabel("Telefonos: ");        JLabel lblMail = new JLabel("E-Mail: ");        JLabel lblDir = new JLabel("Direccion: ");        JLabel lblNac = new JLabel("Nacimiento");        JTextField txtNit = new JTextField(15);        JTextField txtEmpresa = new JTextField(15);        JTextField txtApe = new JTextField(15);        JTextField txtNom = new JTextField(15);        JTextField txtTel = new JTextField(15);        JTextField txtMail= new JTextField(15);        JTextField txtDir = new JTextField(15);        JTextField txtNac = new JTextField(15);        JButton btnInicio = new JButton("Inicio");        JButton btnAtras  = new JButton("Atras ");        JButton btnAdelante = new JButton("Adelante");        JButton btnUltimo = new JButton("Ultimo");        JButton btnAgregar = new JButton("Agregar");        JButton btnGrabar = new JButton("Grabar");//      JLabel lblNum = new JLabel("Cosaco");        JLabel lblNum = new JLabel("1 /");        JLabel lblMax = new JLabel(String.valueOf(MaxProveedores()));        JPanel panel1 = new JPanel(new GridLayout(4,0));        JPanel panel2 = new JPanel(new FlowLayout());        frmProveedores.setLayout(new BorderLayout());        panel1.add(lblNit);        panel1.add(txtNit);        panel1.add(lblEmpresa);        panel1.add(txtEmpresa);        panel1.add(lblApe);        panel1.add(txtApe);        panel1.add(lblNom);        panel1.add(txtNom);        panel1.add(lblTel);        panel1.add(txtTel);        panel1.add(lblMail);        panel1.add(txtMail);        panel1.add(lblDir);        panel1.add(txtDir);        panel2.add(btnInicio);        panel2.add(btnAtras);        panel2.add(lblNum);        panel2.add(lblMax);        panel2.add(btnAdelante);        panel2.add(btnUltimo);        panel2.add(btnAgregar);        panel2.add(btnGrabar);        frmProveedores.add(lblTitulo, BorderLayout.NORTH);        frmProveedores.add(panel1, BorderLayout.CENTER);        frmProveedores.add(panel2, BorderLayout.SOUTH);        frmProveedores.pack();        frmProveedores.setVisible(true);    }    public static void main(String[] pArgs){    }}duro@FireMachine:~/java/Ficticia_1$