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how to find out the datatype

shyam sunder prasad
Ranch Hand

Joined: Mar 23, 2011
Posts: 62
hi,
how to find out the data type based on data.
Stephan van Hulst
Bartender

Joined: Sep 20, 2010
Posts: 3371
    
    9
I guess it depends on the data. Can you be more specific?
shyam sunder prasad
Ranch Hand

Joined: Mar 23, 2011
Posts: 62
suppose,

there is a string s="122.2". so i want to convert it to float type. or based on the date i want to do different operation.

so, is there any method is java to find out what the data type is?
Stephan van Hulst
Bartender

Joined: Sep 20, 2010
Posts: 3371
    
    9
Oh, you want Java to interpret your data? No, Java can't do this. You will have to do it yourself. If you have a String and you know ahead of time that it represents a number, you can call a method like Integer.parseInt() to convert the String to an int.

Do you have a specific reason you're asking this question?
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 36497
    
  16
You can probably Google and find a regular expression for floating-point numbers and for integers in a few seconds. That might work. Some of the expressions here are mistaken, but you have a good chance of finding something useful there.
 
 
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