Problem updating JTextArea

Question

Hello,
I wrote the following code :
Javax.swing.JTextArea siwngTextArea = new Javax.swing.JTextArea();
Java.awt.TextArea awtTextArea = new java.awt.TextArea();
�
for (int i = 0; i < 100; i++){
System.out.println(�S�+i);
swingTextArea.append(�S�+i);
awtTextArea.append(�S�+i);
Why the swing JTextArea Component doesn�t update it�s content in the same way as the awt TextArea (JTextArea will update it's content only at the end of the loop)?

Answer 1

Probably because the TextArea is a heavyweight component - this might be system-specific behaviour to respond instantly (or as instantly as possible).
I believe the Java repaint manager won't respond to all repaint events but will store them up so that they're handled smoothly. Since you're hammering the Swing text area with new data as quickly as the computer can handle it it's not surprising that it doesn't get round to repainting until you've relented.
Try giving it a little room to breathe in the loop:
for (int i = 0; i < 100; i++){
  System.out.println(�S�+i);
  swingTextArea.append(�S�+i);
  awtTextArea.append(�S�+i);
  // Pause for a while
  try
    Thread.sleep(100);
  catch(InterruptedException e)