CODEWITHSUNDEEP
javafile-ioexception
user7193965
user7193965

Reputation:

Java File IO - file must have blank line to be read correctly

I am writing a file IO method and have a while loop within a try/catch clause. Thus works though my txt file that I am reading must have a new blank line at the end in order for it to work corrctly. If the txt file does not have this blank line then it runs but also produces my catch exception error msg at the end.

Any ideas on how to implement a NoSuchElementException to fix this.

Thanks

Upvotes: 1

Views: 54

Answers (3)

user6749601
user6749601

Reputation:

replace 

    String line = reader.readLine();

         while(line.length() > 0) {
            System.out.println(line);

            line = reader.readLine();

         }

with 

         String s;

         while((s = reader.readLine()) != null) {
            System.out.println(s);
         }

Upvotes: 1

Abgehter
Abgehter

Reputation: 149

Change the whileloop to:

while((line = reader.readLine()) != null){
    Sysout...
}

And it will work. Problem with your code is, that you read a line and than enter the whileloop again.

Upvotes: 3

Dan Ionescu
Dan Ionescu

Reputation: 3423

    Scanner in = new Scanner(filename);

    File fileName = new File(filename);

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));

        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }

    } catch(Exception e) {
        System.out.println("ERROR FILE NOT FOUND");
        in.close(); // close scanner if file not found
    }

Upvotes: 1

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