Hi there,
On 07/09/2007, at 7:44 PM, Rainer User wrote:
i am new at the webobjects-dev maillist and new to webobjects too.
I am reading the white printed book "Webobjects 5, Web
Applications", from Apple, it was included in the Webobjects
Package of my Webobject-Box.
On Page 84 i found an example where a funktion trys to detect if a
variable named "personName" [type of it is "String"] is empty or not.
The substantial Code says:
if (personName==null || personName.equals(""))
{
return(true);
}
else
{
return(false);
}
Further to what others have said it is also sometimes helpful to test
for whitespace strings. e.g., " " and treat them as empty also. And
it's often helpful to trim a string of surrounding whitespace...
public static boolean isEmptyString(String value) {
return value == null || value.matches( "^\\s*$" );
}
public void setFirstName(String firstName) {
if (isEmptyString(firstName))
this.firstName = null;
else
this.firstName = firstName.trim();
}
with regards,
--
Lachlan Deck
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