parse & valueOf

[sonali rao]

parsexxx method accepts String arguements with a suffix of f,F,d,D but not l,L.
same is the case with valueOf().
Am i right? [ I hope my question is clear]

[Vad Fogel]

It depends which class method parseXXX is invoked as per API. Float and Double require that the string parameter contain decimals only, otherwise, a NumberFormatException will be thrown at runtime.
Integral wrappers (Byte, Short, Integer, and Long) are less restrictive. They provide overloaded parseXXX and valueOf methods that accept radix as a second argument. The parsable string must contain only digits of the specified radix base. The radix argument is usually one of (2,8,10,16).
So, the allowed digits for radix 2 are 0 and 1; for radix 8: 0-7; for radix 16: 0-F.
However, you can provide your own radix in case you're up to this sport:

   int i=Integer.parseInt("1120",3);   
   System.out.println(i);   //result is 42

valueOf works exactly the same way as parseXXX. parseXXX taking one argument assumes that the base is 10, so the only allowed digits are 0-9.
Letters L, X, and l are not allowed as part of the string at runtime as they are normally not digits of any normal radix base (you can go fancy though).
[ November 11, 2003: Message edited by: Vad Fogel ]

[Harwinder Bhatia]

Sonali
I guess what you are referring to is parseType (String) and valueOf (String) methods:

 valueOf (String), parseType (String) methods and WrapperType (String) constructors:

    a. (+) sign is OK for float and double types and NOT for byte, short,
       int or long.
    b. f, F is OK for float; d, D is OK for double; but l, L is NOT OK for
       long.
    c. Hexadecimal integers (containing x or X) are NOT OK.

Any String argument that does not follow the above rules result in
a NumberFormatException at run-time !!
Cheers
Harwinder
[ November 12, 2003: Message edited by: Harwinder Bhatia ]