src/macosx/classes/sun/lwawt/LWTextComponentPeer.java

*** 124,133 ****
--- 124,139 ----
      }
  
      @Override
      public void setText(final String l) {
          synchronized (getDelegateLock()) {
+             // Please note that we do not want to post an event
+             // if TextArea.setText() or TextField.setText() replaces an empty text by an empty text,
+             // that is, if component's text remains unchanged.
+             if (l.isEmpty() && getTextComponent().getDocument().getLength() == 0) {
+                 return;
+             }
              // JTextArea.setText() posts two different events (remove & insert).
              // Since we make no differences between text events,
              // the document listener has to be disabled while
              // JTextArea.setText() is called.
              final Document document = getTextComponent().getDocument();