import java.awt.Color;
import java.awt.*;
import javax.swing.*;
import javax.swing.JFrame;

public class OxnarExemploJFrame 
{
		JFrame janela; 
		JPanel Painel1,Painel2, Painel3;	
		JButton botao = new JButton("AAAAAAA"); 	
		public OxnarExemploJFrame()
		{
			
				JFrame janela = new JFrame("Meu primeiro frame em Java");		
				janela.setLayout(new GridLayout(1, 4));
				janela.add(Painel1 = new JPanel ()); 					
				janela.add(Painel2 = new JPanel ());
				janela.add(Painel3 = new JPanel ());	
					
				Painel1.add(new JLabel ("ESTE É O PAINEL 1"));
				Painel2.add(new JLabel ("ESTE É O PAINEL 2"));
 
				
				Painel1.setBackground(Color.blue);
			 	Painel3.setBackground(Color.red);
			 	
				janela.setSize(600, 500);
				janela.setVisible(true);
				janela.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );		
				janela.setResizable(false);
				Painel3.add(botao);
      				botao.setPreferredSize(new Dimension(50, 100));
		}
    	public static void main(String[] args) 
    			{new OxnarExemploJFrame();}
}