My JTextArea content is not refreshed, any ideas suggestions

Question

Hi, I have a swing application which contains two text areas, during some process I print information in the textareas but information only appears once the "do while" is finished. Also I call a pause() which only is supposed to pause between each line but as I said the text area is only filled once the loop is over � thanks in advance for any good suggestions.
�
do{
outputContent("aaaaa");
pause(3000);
}while(action != null)
�
�.
pause(long p){
try {
Thread.sleep(p);
catch(InterruptedException e) {
e.printStackTrace();
�
outputContent(String p)
txtainfo.append(pt);
txtainfo.append("\n\r");
txtanotify.append(p);
txtanotify.append("\n\r");

Answer 1

All the events in Swing are registered with an Event Queue.
The queue dispatches events one by one. Components continues adding events in Queue and Queue continues dispatching events one by one. Repaint is one of that event. When a component think to repaint itself, it adds PaintEvent in Queue and Queue dispatches the event on it's required time.
In your case on each append the PaintEvent is added in the Queue but the thread is slept so after all appends all the paint events are fired one by one.
If you run your do-while loop into a thread then this thing will not happen as your new thread will sleep rather than main thread. So you can consider following:
new Thread(){
public void run(){
do{
// write content and pause
} while();
}.start();
May this help you.
Regards,