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Name: yyT116575 Date: 08/01/2001 java version "1.3.1" Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24) Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode) The primitive wrapper classes have parsers for String values: e.g. "Double.parseDouble(String)" and "Integer.parseInt(String)". If the String fails to parse, it throws a NumberFormatException. Unfortunately, handling a thrown exception can be expensive as far as performance. I would like to see a method added that would allow the String to be read in and parsed without needing to test it manually to prevent a NumberFormatException. A multi-use method to solve this would be "Double.parseDouble(String, double)" which would use the double parameter as a default. The user could put in Double.NaN as a default to indicate a failure. "Integer.parseInt(String, int)" wouldn't have the advantage of a definite non-integer, but if the user knows a value that will never occur in the input, which is very likely, this would provide the means to avoid a NumberFormatException, while allowing the option of using a substitute value. A simpler (and less useful) method could be "Double.isDouble(String)" or "Double.canParseDouble(String)" that would return a boolean indicating whether the parse would be successful. _______________________________ It has been stated in the "Java Q&A" that exceptions should only be used to handle error conditions, and never used to control program flow. Therefore, a method should be added to allow real-time and time-sensitive applications a better alternative. (Review ID: 129232) ====================================================================== ###@###.### 10/28/04 01:07 GMT
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