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angus fraser wrote:
> 
> Hi,
> 
> A beginners type question.
> 
> I want to read 2 double(temperature) values entered via the console(it's a
> fairly trivial console program) but I can't get it to work using the
> following :-
> 
> double dry ;
> double wet ;
> try {
>      DataInputStream dis = new DataInputStream( System.in );
>      System.out.println("Enter Temp 1 > ");
>      dry = dis.readDouble();
>      System.out.println("Enter Temp 2 > ");
>      wet = dis.readDouble();
>     }
>     catch ( IOException e ) { }
> 
> What is the correct way to read float/double values entered via a console
> window



Because people can type in strings there, say "aaaa", you need
to test to ensure what they entered was a legal value.

So, pull a string.  Then for your Float, use java.lang.Float's
valueOf() method.  If it doesn't parse, it'll throw an exception,
so you can trap that.

java.lang.Double() has a similiar valueOf() method.  To parse a
string to an integer, use parseInt().


Hope that helps.


Andrew
--
  Andrew Bennett
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