Java Swing BoxLayout horizontal

import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.BoxLayout;
import java.awt.BorderLayout;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("BoxLayout Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();

        JPanel hPanel = new JPanel();
        BoxLayout boxLayout = new BoxLayout(hPanel, BoxLayout.X_AXIS);
        hPanel.setLayout(boxLayout);//from   w w w. j  a  v a  2s  .  c om

        for (int i = 1; i <= 3; i++) {
            hPanel.add(new JButton("Button " + i));
        }

        contentPane.add(hPanel, BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
    }
}