Threaded Progress bar wont restart

Question

I know that if i have a progress bar on a form and i wont it to increment on a button click, i must thread it so i did this
the Main class is "class Form" with variables
public static JProgressBar progress;
ThreadedProgress threadbar = new ThreadedProgress();
public void actionPerformed(ActionEvent e)
if (e.getActionCommand() == "Submit")
threadbar.start();
in the same file i made the a theard to increment the progress bar
class ThreadedProgress extends Thread
     int num = 0;
     ThreadedProgress()
          //setDaemon(true);
public void run ()
num = 0;
Form.progress.setValue(0); // progress bar in "class Form"
while (num <1001)
Form.progress.setValue(num);
try
Thread.sleep(10);
catch (InterruptedException e)
     JOptionPane.showMessageDialog(null,e);
num += 10;
if(num > 1001)
JOptionPane.showMessageDialog(null,"MessageSent");           
When i click the "Submit" button once to increment the progress bar with the thread it works fine but when i click it a 2nd time, nothing happens...

Answer 1

Probably the easiest thing to do is to make an anonymous inner Thread class that is within your actionPerformed(ActionEvent e) method. This was a new Thread class could be made each time the button is clicked.
I gather that from your code, after a message has been sent, you want to show progress for a second. With Java 1.4 - it is possible to put the progress bar in indeterminate mode:
progressBar.setIndeterminate(true);  // starts progress bar animation
progressBar.setIndeterminate(false); // stops progress bar animationhttp://java.sun.com/docs/books/tutorial/uiswing/components/progress.html
When you start sending your message, you could start the animation, and stop animation when the message is sent. You can reuse this method numerous time, as Java makes the required threads, etc. internally.
Good Luck!