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Another example is the fact that accessing the contents of a file that does not exist in [[Java programming language|Java]] version 1.3 or older would result in an <code>IOException</code> without any reference to the missing file. |
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Revision as of 15:10, 12 June 2006
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Error hiding is a common practice to hide error messages by overriding them with exception handling. The user will never know what really went wrong. Error hiding is an example of an anti-pattern.
Example:
try
ImportFile(filename);
except
// a exception with almost no information
raise Exception.Create('import failed');
end;
// better approach
try
ImportFile(filename);
except
on E:Exception do
begin
// build a informative message
E.Message := 'Import of file <'+filename+'> failed.'+#13#10 +
E.Message;
// re-raise the exception
raise;
end;
end;
Another example is the fact that accessing the contents of a file that does not exist in Java version 1.3 or older would result in an IOException without any reference to the missing file.
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