Integer.parseInt() throws NumberFormatException with UTF-8 files

Question

I need to parse integers from contents of a file.

For testing my algorithms, when I give the contents of a file from a declared string

String test = "15 kuruş";

Integer.parseInt works fine. But when I read with Scanner class from a UTF-8 file it doesn't work and gives the exception

java.lang.NumberFormatException: For input string: "15"

Note: I split the string to "15" and "kuruş" so the parseInt method takes only "15" as argument.

Sample code:

    satir = satir.trim();//15 kuruş
    StringTokenizer tokenizer = new StringTokenizer(satir," ");
    System.out.println(tokenizer.countTokens());//2
    String s = tokenizer.nextToken();
    int deger = Integer.parseInt(s);//where the exception was throwed

Answer 1

Your UTF-8 File probably starts with a BOM, you have to read the File with the correct encoding or get rid of it manually.

So when your 15 is not preceeded with the BOM anymore, Integer.parseInt() will work.