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

public class BoxLayoutTest extends JFrame
{
    public BoxLayoutTest()
    {
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        
        JButton botao1 = new JButton("Botão 1");
        JButton botao2 = new JButton("Botão 2");
        JButton botao3 = new JButton("Botão 3");
        JButton botao4 = new JButton("Botão 4");
        JButton botao5 = new JButton("Botão 5");
        
        panel.add(botao1);
        panel.add(botao2);
        panel.add(botao3);
        panel.add(botao4);
        panel.add(botao5);
        
        getContentPane().add(panel);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        pack();
        setVisible(true);
    }
    
    public static void main(String args[])
    {
        new BoxLayoutTest();
    }
}