JButton button = new JButton("Clear");
button.addActionListener(this);
textField = new JTextField(20);
textField.addActionListener(new MyTextActionListener());
textField.getDocument().addDocumentListener(
new MyDocumentListener("Text Field"));
textArea = new JTextArea();
textArea.getDocument().addDocumentListener(
new MyDocumentListener("Text Area"));
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setPreferredSize(new Dimension(200, 75));
displayArea = new JTextArea();
displayArea.setEditable(false);
JScrollPane displayScrollPane = new JScrollPane(displayArea);
displayScrollPane.setPreferredSize(new Dimension(200, 75));
JPanel contentPane = new JPanel();
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
contentPane.setLayout(gridbag);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1.0;
/*
* Hack to get around gridbag's refusal to allow
* multi-row components in anything but the left column.
*/
JPanel leftPanel = new JPanel();
leftPanel.setLayout(new BorderLayout());
leftPanel.add(textField, BorderLayout.NORTH);
leftPanel.add(scrollPane, BorderLayout.CENTER);
c.gridheight = 2;
gridbag.setConstraints(leftPanel, c);
contentPane.add(leftPanel);
c.weighty = 1.0;
c.gridwidth = GridBagConstraints.REMAINDER;
c.gridheight = 1;
gridbag.setConstraints(displayScrollPane, c);
contentPane.add(displayScrollPane);
c.weighty = 0.0;
gridbag.setConstraints(button, c);
contentPane.add(button);
textField.requestFocus();
setContentPane(contentPane);
