import javax.swing.*;
import java.awt.Font;
import java.awt.BorderLayout;
import javax.swing.event.*;
import java.util.Hashtable;

public class BoxLayoutTest4 extends JFrame implements ChangeListener{

  JSlider slider;
  JButton button1;
  JButton button2;
  JButton button3;

  public static void main(String[] args){
    BoxLayoutTest4 frame = new BoxLayoutTest4();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("ƒ^ƒCƒgƒ‹");
    frame.setVisible(true);
  }

  BoxLayoutTest4(){
    button1 = new JButton("Google");
    button1.setAlignmentX(0.5f);

    button2 = new JButton("Yahoo!");
    button2.setFont(new Font("Arial", Font.PLAIN, 30));
    button2.setAlignmentX(0.5f);

    button3 = new JButton("MSN");
    button3.setAlignmentX(0.5f);

    JPanel p = new JPanel();
    p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));

    p.add(button1);
    p.add(button2);
    p.add(button3);

    Hashtable<Integer, JComponent> table = new Hashtable<Integer, JComponent>();

    table.put(new Integer(0), new JLabel("0.0f "));
    table.put(new Integer(5), new JLabel("0.5f "));
    table.put(new Integer(10), new JLabel("1.0f "));

    slider = new JSlider(0, 10);
    slider.setMajorTickSpacing(1);
    slider.setPaintTicks(true);
    slider.setLabelTable(table);
    slider.setPaintLabels(true);
    slider.addChangeListener(this);

    getContentPane().add(p, BorderLayout.CENTER);
    getContentPane().add(slider, BorderLayout.PAGE_END);
  }

  public void stateChanged(ChangeEvent e) {
    float pos = (float)(slider.getValue()) / 10.0f;

    button1.setAlignmentX(pos);
    button2.setAlignmentX(pos);
    button3.setAlignmentX(pos);

    button1.revalidate();
  }