java.lang.NumberFormatException while reading file input

Question

File folderPathFile = new File("C:\\Users\\ali\\Desktop\\folderPath.txt");


    BufferedReader reader = new BufferedReader(new FileReader(folderPathFile));
    String line = reader.readLine();
    while(line != null){
        foldersPath.add(line);
        line = reader.readLine();
    }
    reader.close();


    String lineDup = line.toString();
        String[] LineSplits = lineDup.split(",");


        String[] array = LineSplits[1].trim().split(" ");
        for(int i =0; i<array.length;i++) {
            int fr = Integer.parseInt(array[i]);
            System.out.println(fr);//its printing
        }

        int fr1 = Integer.parseInt(LineSplits[0]);
        System.out.println(fr1);
}

My Problem is when i run this code i've java.lang.Exception: java.lang.NumberFormatException: For input string: "900"

INPUT i'm Giving i.e myfile data is 900, 200 300 400 500 600

Why for 900 only i'm getting such error ?

@Satya It's 4 and Ankur's answer worked .. i wrote the line again and everything Worked :) — user4834352
– user4834352, Commented Jul 17, 2015 at 17:19

Community · Accepted Answer · 2017-05-23 11:44:19Z

2

Check for the lineSplit[0] length if it's 4 then there is an invisible character i.e ZERO WIDTH NO-BREAK SPACE . It's hard to detect as it's invisible and trimming won't delete that character. If so you need to get rid of that character

EDIT: As you are Saying it's length is 4. try this LineSplits[0].replace(u'\ufeff', '') or You can write that number yourself instead of copying it from somewhere

You can check the long discussion about this character here on this SO Question though it's regarding HTML but makes sense how this character comes and all

edited May 23, 2017 at 11:44

CommunityBot

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answered Jul 17, 2015 at 17:02

Ankur Anand

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2 Comments

user4834352 Over a year ago

Yes it's showing 4 how to get rid of that Character ?

user4834352 Over a year ago

Worked Like ANYTHING .. I never realized this can also Happen .. Thank you :)

Prashant · Accepted Answer · 2016-08-11 11:53:45Z

0

If you are newbie to MapReduce programming and just learning from sample input file that you have copy pasted from the web then just create input file manually as during copy paste some UTF characters also get pasted.

I solved the issue by manually creating sample file.

answered Aug 11, 2016 at 11:53

Prashant

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