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how to judge whether a string is a valid number(integer) before parsing it?

 
Greenhorn
Posts: 3
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Hi, I want to parse a string to a number. To avoid exceptions, I want to judge whether a string is a valid number(integer) before parsing it. Could you please tell me the methods for doing this?
Thanx.
 
"The Hood"
Posts: 8521
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Put it in a try catch block
<PRE>

try{
int i = Integer.parseInt(args[0]);
}

catch (NumberFormatException e){
System.out.println("Please enter only numerics");
System.exit(0);
}
</PRE>
 
Cindy Glass
"The Hood"
Posts: 8521
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Oh yeah,
Please change your name to be compliant with JavaRanch's naming policy.
Your ID should be 2 separate names with more than 1 letter each. We really want this to be a proffesional forum and would prefer that you use your REAL name.
Thanks,
Cindy
 
Greenhorn
Posts: 4
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I did. Thank you for your reminder.
 
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