package simple; class MyClass5b extends MyClass5a { /*package*/ boolean factory; private boolean preset; private boolean postset; private int value; private void preset() { preset = true; value = 1; } private void postset() { postset = true; if (value == 2) { value = 3; } } private void preget() { value = 2; } protected void verify() { if (!factory || !preset || !postset) { throw new IllegalStateException ("factory, pre-set, or post-set method not called"); } } }