Re: Java String to integer conversion not working

From:

"Daniel Pitts" <googlegroupie@coloraura.com>

Newsgroups:

comp.lang.java.programmer

Date:

19 Mar 2007 16:09:43 -0700

Message-ID:

<1174345782.995691.297520@y80g2000hsf.googlegroups.com>

On Mar 19, 3:53 pm, ashish.lo...@gmail.com wrote:

On Mar 19, 6:19 pm, Thomas Fritsch <i.dont.like.s...@invalid.com>
wrote:

ashish.lo...@gmail.com wrote:

I'm am working on converting a String "596" (I'm reading it from a txt
file) to an integer using parseInt() however I get
NumberFormatException for the input string : "596". I tried to use
trim() method before using parseInt on the String but still doens't
work.

Also, I tried to get the length of the input string "596" which I read
from the file and the length comes out to be 7. How did that happen? I
thought the length should be 3.

Please advise.

If you have an IDE, start your application within the debugger of the
IDE. Set a breakpoint before the line where you parse the string, and
look inside your String.

If you don't have an IDE, dump out the String before you parse it:
    String s = ...; // your string
    for (int = 0; i < s.length(); i++) {
       char c = s.charAt(i);
       System.out.println("s[" + i + "] = " + (int)c + " = " + c);
    }
See what output you get.

I used the above code segment and realized that before every integer
there was a null char
so the output being:
s[0] = 0 =
s[1] = 53 = 5
s[2] = 0 =
s[3] = 54 = 6
s[4] = 0 =
s[5] = 57 = 9
s[6] = 0 =

So i just created a new string using the chars I extracted from the
above code.

Thanks for your help.

AL

--
Thomas

Sounds like you're not setting up the proper encoding for reading the
string. While your "fix" may be working now, you should use the
proper decoding by creating an InputStreamReader object, and passing
THAT to your BufferedReader object.