public class FreezeEDT extends JFrame implements ActionListener {
  public FreezeEDT() {
    super("Freeze");
    JButton freezer = new JButton("Freeze");
    freezer.addActionListener(this);
    add(freezer);
    pack();
  }

  public void actionPerformed(ActionEvent e) {
    try {
      Thread.sleep(4000);
    } catch (InterruptedException e) {
    }
  }

  public static void main(String... args) {
    FreezeEDT edt = new FreezeEDT();
    edt.setVisible(true);
  }
}

public void actionPerformed(ActionEvent e) {
  new Thread(new Runnable() {
      public void run() {
        String text = readHugeFile();
        textArea.setText(text);
      }
  }).start();
}

public void actionPerformed(ActionEvent e) {
  new Thread(new Runnable() {
      public void run() {
        final String text = readHugeFile();
        SwingUtilities.invokeLater(new Runnable() {
          public void run() {
            textArea.setText(text);
          }
        }
      }
  }).start();
}

public void actionPerformed(ActionEvent e) {
  JFrame f = new JFrame();
  f.getContentPane().setLayout(new FlowLayout());
  for (int i = 0; i < 5000; i++) {
    f.add(new JLabel("Label " + i));
  }
  f.pack();
  f.setVisible(true);
}

private void incrementLabel() {
  tickCounter++;
  Runnable code = new Runnable() {
    public void run() {
      counter.setText(String.valueOf(tickCounter));
    }
  };

  if (SwingUtilities.isEventDispatchThread()) {
    code.run();
  } else {
    SwingUtilities.invokeLater(code);
  }
}

try {
  final int[] answer = new int[1];
  SwingUtilities.invokeAndWait(new Runnable() {
    public void run() {
      answer[0] = JOptionPane.showConfirmDialog(SwingThreadingWait.this,
        "Abort long operation?",
        "Abort?",
        JOptionPane.YES_NO_OPTION);
    }
  });
  if (answer[0] == JOptionPane.YES_OPTION) {
    return;
  }
} catch (InterruptedException ie) {
} catch (InvocationTargetException ite) {
}

public class SafeComponent extends JLabel {
  public SafeComponent() {
    super("Safe Repaint");
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    System.out.println(SwingUtilities.isEventDispatchThread());
  }
}

public class FileFinderWorker extends SwingWorker {
  private JList filesList;
  private DefaultListModel filesListModel;

  public FileFinderWorker(JList filesList) {
    this.filesList = filesList;
    this.filesListModel = new DefaultListModel();
    this.filesList.setModel(this.filesListModel);
  }

  public void start() {
    filesListModel.removeAllElements();
    filesListModel.addElement("Searching *.java...");
    super.start();
  }

  public void finished() {
    filesListModel.removeAllElements();
    String[] files = (String[]) get();
    for (String file: files) {
      filesListModel.addElement(file);
    }
  }

  public Object construct() {
    FileFilter filter = new FileFilter() {
      public boolean accept(File pathname) {
        return pathname.getName().endsWith(".java");
      }
    };

    final List list = new ArrayList();
    final int[] counter = new int[1];

    try {
      FileTreeWalker walker = new FileTreeWalker(".", filter);
      walker.walk(new FileTreeWalk() {
        public void walk(File path) {
          list.add(path.toString());
          counter[0]++;
          SwingUtilities.invokeLater(new Runnable() {
            public void run() {
              filesListModel.setElementAt("Searching *.java... (" + counter[0] + ")", 0);
            }
          });
        }
      });
    } catch (IOException e) {
    }

    return list.toArray(new String[list.size()]);
  }
}