erratum on Duplicate Observed Data example

in the method EndField_FocusLost, setEnd is called before the integer valid=
ation, it should be called after:

if (isNotInteger(_endField.getText())) {
=A0=A0=A0 setEnd("0");
} else {
=A0=A0=A0 setEnd(_endField.getText());
}

Or this check could be moved into the observable's setter, since the intege=
r requirement is really a constraint of the domain.

the reasoning is that if there are other observers in the system, then they=
 could be updated with transient invalid values. Is this analysis correct?

Thanks for the great book,

Andrew



[Non-text portions of this message have been removed]



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