title: How to a add a vertical scroll bar to a JTextArea in Swing?
body: <p>I have this Gui class:</p>
  
  <pre><code>public class Gui extends JFrame implements ActionListener {
  
  /**
   * 
   */
  private static final long serialVersionUID = -384241835772507459L;
  JLabel playerInfo;
  JTextField textField;
  private final static String newline = "\n";
  JTextArea feed;
  JScrollPane scrollPane;
  Player player;
  
  public Gui() {
      super("Erik's RPG");        
      setLayout(new FlowLayout());        
      textField = new JTextField(30);     
      textField.addActionListener(this);      
      feed = new JTextArea(15, 30);
      feed.setEditable(false);    
  }
  
  public void setCurrentPlayer(Player currentPlayer) {
      player = currentPlayer;
      playerInfo = new JLabel("Health = " + currentPlayer.getHealth() + " | Mana = " + player.getMana());
      playerInfo.setBorder(BorderFactory.createTitledBorder(currentPlayer.getName()));
      add(playerInfo);
      add(feed);
      add(textField);
  }
  </code></pre>
  
  <p>And it is annoying when a bunch of text is in the text field because it keeps making the window larger. I need to know how to make a scrollbar so the user doesn't have to keep resizing his JFrame. Also, how can I lock the dimensions of a JFrame so users can adjest the size?</p>