Add JToggleButton to each part of a border layout in Java

import java.awt.BorderLayout;
import java.awt.Container;
//from   w  w  w  .j  ava2  s. com
import javax.swing.JFrame;
import javax.swing.JToggleButton;

public class Main {
  public static void main(String args[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = f.getContentPane();
    content.add(new JToggleButton("North"), BorderLayout.NORTH);
    content.add(new JToggleButton("East"), BorderLayout.EAST);
    content.add(new JToggleButton("West"), BorderLayout.WEST);
    content.add(new JToggleButton("Center"), BorderLayout.CENTER);
    content.add(new JToggleButton("South"), BorderLayout.SOUTH);
    f.setSize(300, 200);
    f.setVisible(true);
  }
}