Since Apple forced the update to JDK 7 on Mac, old AWT applets no longer support copy/paste. For example, if you visit:
Simple AWT Textfield Example
you cann
Oracle released Java 6 Update 24 in February 2011 to remedy 21 vulnerabilities: Announcement
As part of this security release, the ability to copy & paste from a computer's clipboard into a Java applet has been disabled.
To fix this issue there are 2 solutions: