CODEWITHSUNDEEP
javaarraylist
Keerthana
Keerthana

Reputation: 157

To read Double values

I want to read double values stored in a text file and store those values in an array.The input file has one value in each line. Following is my code.

File file=new File("val.txt");
 List<Double> value = new ArrayList<Double>();
     Scanner input = new Scanner(file);
     while(input.hasNext()){
       value.add(scanner.nextDouble());}

But i get Nosuchelement exception. What is wrong the code?. How to read double values from the file and store it?

Upvotes: 0

Views: 267

Answers (1)

Alexis C.
Alexis C.

Reputation: 93842

It seems like you are using 2 scanners. You're checking with one if it has a value and you're trying to add this value using another scanner.

Use only the input one.

So change it to:

File file=new File("val.txt");
List<Double> value = new ArrayList<Double>();
Scanner input = new Scanner(file);
while(input.hasNextDouble()){
   value.add(input.nextDouble());
}

Note that the Scanner use your default locale (if you don't specify one). So if this locale separates decimals by a , you'll add nothing to your List. So make sure you use one that separates decimals by a dot.

Scanner input = new Scanner(file).useLocale(Locale.UK);

Upvotes: 3

Related Questions