Ejercicio Paneles

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class DemoPanel extends JFrame{
Container contenedor;
private JPanel panelinicio;
private JPanel panelfin;
private JPanel paneli;
private JPanel paneld;
private JButton [][] botones;
private JLabel[][] texto;
private JTextField [][] text;

public DemoPanel(){
super("Campeonato Nacional");
botones = new JButton[3][3];
contenedor = getContentPane();
panelinicio = new JPanel(new GridLayout(3,3,10,10));
String [] equipos = {"Barcelona","Emelec","El Nacional","D.Quito","D.Cuenca","Olmedo","Macara","Manta","Tecnico U."};

int k=0;
for(int i = 0; i < 3; i++){
for(int j = 0; j < 3; j++){
botones[i][j] = new JButton(equipos[k]);
k += 1;
panelinicio.add(botones[i][j]);
}
}
contenedor.add(panelinicio, BorderLayout.NORTH);

texto = new JLabel[5][5];
panelfin = new JPanel(new GridLayout(5,5,10,10));
for(int i = 0; i < 5; i++){
for(int j = 0; j < 5; j++){
texto[i][j]= new JLabel("texto" +i+ " "+j);
panelfin.add(texto[i][j]);
}
}
contenedor.add(panelfin, BorderLayout.SOUTH);

text = new JTextField[4][3];
paneli = new JPanel(new GridLayout(5,5,10,10));
for(int i = 0; i < 4; i++){
for(int j = 0; j < 3; j++){
text[i][j]= new JTextField("texto" +i+ " "+j);
paneli.add(text[i][j]);
}
}
contenedor.add(paneli, BorderLayout.WEST);

text = new JTextField[2][4];
paneld = new JPanel(new GridLayout(5,5,10,10));
for(int i = 0; i < 2; i++){
for(int j = 0; j < 4; j++){
text[i][j]= new JTextField("texto" +i+ " "+j);
paneld.add(text[i][j]);
}
}
contenedor.add(paneld, BorderLayout.EAST);

setSize(425,425);
setVisible(true);
}

public static void main(String args[]){
DemoPanel aplicacion = new DemoPanel();
aplicacion.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}