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

/**
 * Illustrate the layout style of a BoxLayout.
 * 
 * @author David J. Barnes and Michael Kölling
 * @version 2011.07.31
 */
public class BoxLayoutExample
{
    private JFrame frame;

    /**
     * Constructor for objects of class BoxLayoutExample
     */
    public BoxLayoutExample()
    {
        makeFrame();
    }

    /**
     * Create a BoxLayout and place five components within it.
     */
    private void makeFrame()
    {
        frame = new JFrame("BoxLayout Example");
        
        Container contentPane = frame.getContentPane();
        contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
        contentPane.add(new JButton("first"));
        contentPane.add(new JButton("second"));
        contentPane.add(new JButton("the third string is very long"));
        contentPane.add(new JButton("fourth"));
        contentPane.add(new JButton("fifth"));
        
        frame.pack();
        frame.setVisible(true);
    }
}