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

//********************************************************
//  LayoutDemo.java   Original Authors: Lewis/Loftus
//
//  Demonstrate various layout managers
//********************************************************
public class LayoutDemo
{
   public static void main(String[] args)
   {
      JFrame frame = new JFrame("Layout Manager Demo");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      
      JTabbedPane tp = new JTabbedPane();
      tp.addTab("Intro", new IntroPanel());
      tp.addTab("Flow", new FlowPanel());
      tp.addTab("Border", new BorderPanel());
      tp.addTab("Grid", new GridPanel());
      tp.addTab("Box", new BoxPanel());
      
      frame.getContentPane().add(tp);
      frame.pack();
      frame.setVisible(true);    
   }
}
   
class IntroPanel extends JPanel
{
  public IntroPanel()
  {
    setBackground(Color.green);
    add(new JLabel("Layout Manager Demonstration"));
    add(new JLabel("Choose a tab to see an example of a layout manager"));
  }
}
   
class FlowPanel extends JPanel
{
  public FlowPanel()
  {
    setLayout(new FlowLayout());
    setBackground(Color.green);
    JButton b1 = new JButton("Button 1");
    JButton b2 = new JButton("Button 2");
    JButton b3 = new JButton("Button 3");
    JButton b4 = new JButton("Button 4");
    JButton b5 = new JButton("Button 5");
    add(b1);
    add(b2);
    add(b3);
    add(b4);
    add(b5);
  }
}

class BorderPanel extends JPanel
{
  public BorderPanel()
  {
    setLayout(new BorderLayout());
    setBackground(Color.green);
    JButton b1 = new JButton("Button 1");
    JButton b2 = new JButton("Button 2");
    JButton b3 = new JButton("Button 3");
    JButton b4 = new JButton("Button 4");
    JButton b5 = new JButton("Button 5");
    add(b1, BorderLayout.CENTER);
    add(b2, BorderLayout.NORTH);
    add(b3, BorderLayout.SOUTH);
    add(b4, BorderLayout.EAST);
    add(b5, BorderLayout.WEST);
  }
}

class GridPanel extends JPanel
{
  public GridPanel()
  {
    setLayout(new GridLayout(2, 3));
    setBackground(Color.green);
    JButton b1 = new JButton("Button 1");
    JButton b2 = new JButton("Button 2");
    JButton b3 = new JButton("Button 3");
    JButton b4 = new JButton("Button 4");
    JButton b5 = new JButton("Button 5");
    add(b1);
    add(b2);
    add(b3);
    add(b4);
    add(b5);
  }
}

class BoxPanel extends JPanel
{
  public BoxPanel()
  {
    setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
    setBackground(Color.green);
    JButton b1 = new JButton("Button 1");
    JButton b2 = new JButton("Button 2");
    JButton b3 = new JButton("Button 3");
    JButton b4 = new JButton("Button 4");
    JButton b5 = new JButton("Button 5");
    add(b1);
    add (Box.createRigidArea(new Dimension(0,10)));
    add(b2);
    add (Box.createVerticalGlue());
    add(b3);
    add(b4);
    add(Box.createVerticalStrut(10));
    add(b5);
  }
}