!7

sclass NumClasses extends DynTextArea {
  void start {
    super.start();
    doEveryAndNow(10.0, r calc);
  }
  
  void calc {
    temp enter();
    setText(multiSetToLines(classMultiSetByName(
      allClassesLoadedByJavaXClassLoaders()));
  }
  
  JComponent visualize() {
    ret componentPopupMenuItem(super.visualize(), "Garbage Collect", r gc);
  }
}