Codigo De Programaccion

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Escenario
{
JFrame ventana;
JPanel panFondo;
JPanel pan1;
JPanel pan2;JPanel pan3;
JPanel pan4;
JPanel pan5;
JPanel pan6;

public Escenario()
{
ventana=new JFrame("Mensaje");//nombre de la ventana
ventana.setSize(1024,800);ventana.setLocationRelativeTo(null);
ventana.setVisible(true);

panFondo=new JPanel(new GridBagLayout());
panFondo.setBackground(new Color(20,50,0));
ventana.add(panFondo);

//botones();demoGbl();
}
void demoGbl()
{
GridBagConstraints gbc=new GridBagConstraints();
JButton vb[]=new JButton[7];
int vw[]={200,100,100,100,100,100,100,100};
intvh[]={100,300,100,200,200,100,100,100};
for(int i=0;i<vb.length;i++)
{
vb[i]=new JButton("boton "+i);
vb[i].setPreferredSize(new Dimension(vw[i],vh[i]));
}
gbc.gridx=0;
gbc.gridy=0;
gbc.gridwidth=2;gbc.gridheight=1;
panFondo.add(vb[0],gbc);

gbc.gridx=2;
gbc.gridy=0;
gbc.gridwidth=1;
gbc.gridheight=3;
panFondo.add(vb[1],gbc);

gbc.gridx=3;
gbc.gridy=0;gbc.gridwidth=1;
gbc.gridheight=1;
panFondo.add(vb[2],gbc);

gbc.gridx=0;
gbc.gridy=1;
gbc.gridwidth=1;
gbc.gridheight=2;
panFondo.add(vb[3],gbc);

gbc.gridx=1;
gbc.gridy=1;gbc.gridwidth=1;
gbc.gridheight=2;
panFondo.add(vb[4],gbc);

gbc.gridx=3;
gbc.gridy=1;
gbc.gridwidth=1;
gbc.gridheight=1;
panFondo.add(vb[5],gbc);

gbc.gridx=3;
gbc.gridy=2;gbc.gridwidth=1;
gbc.gridheight=1;
panFondo.add(vb[6],gbc);

}
void botones()
{
for(int i=1;i<21;i++)
{
JButton bg=new JButton ("boton"+i);
panFondo.add(bg);
}
}

}