Problem sizing a JTextArea

Question

I'm trying to write a class with a button which, when clicked, will alternate between two panels.
My problem is the entire "details" message will not display.
I've tried various combinations of layout managers with calls to setSize() and setRows(), or using a JTextPane instead.
My brain feels like a bowl of spaghetti because I'm not getting anywhere.
What am I missing?
Thanx to one and all.import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import  javax.swing.border.*;
public class ToggleButton extends JFrame implements ActionListener
   private JButton button;
   private JPanel panel , detailPanel;
   private Container contentPane = getContentPane();
   public ToggleButton()
      setLayout(new GridLayout(2,1));
      setBounds(400 , 250 , 200 , 100);
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      button = new JButton("Show Details");
      button.addActionListener(this);
      panel = new JPanel();
      panel.add(button);
      JTextArea details = new JTextArea();
      TitledBorder  border = BorderFactory.createTitledBorder("Details");
      details.setBorder(border);
      details.setLineWrap(true);
      String text = "Now is the time for all good women to come to the aid of their men.";
      details.setText(text);
      detailPanel = new JPanel();
      detailPanel.add(details);
      contentPane.add(panel);
      setVisible(true);
   public void actionPerformed(ActionEvent ae)
      if (ae.getActionCommand().equals("Show Details"))
         button.setText("Hide Details");
         setBounds(400 , 250 , 200 , 200);
         contentPane.add(detailPanel);
      else
         button.setText("Show Details");
         contentPane.remove(detailPanel);
         setBounds(400 , 250 , 200 , 100);
   public static void main(String[] args)
      new ToggleButton();
}

Answer 1

   public void actionPerformed(ActionEvent ae)
      if (ae.getActionCommand().equals("Show Details"))
         button.setText("Hide Details");
         setBounds(400 , 250 , 200 , 200);
         contentPane.add(detailPanel);
      else
         button.setText("Show Details");
         contentPane.remove(detailPanel);
         setBounds(400 , 250 , 200 , 100);
      validate();
   }The Grid layout will cause problems, but I am sure you can figure that out.
FYI: It might be better practice to toggle the details panel's visibility rather than adding and removing it. Just a thought.