CODEWITHSUNDEEP
javasplitindexoutofboundsexception
user3728492
user3728492

Reputation: 23

ArrayIndexOutOfBoundsException when splitting a string read from a file

I am reading a file one line at a time. Each line in the file contains two numbers separated by a space. To work with both the numbers I used the split function and created an array to store the values. However, when I run my program it gives the arrayIndexOutofBoundsException. I have used the split function before. I can't seem to figure out why its displaying it now. Each line in my text file looks like this:

5 15

3 7

code:

for (int i=0; i<5; i++) {
try {
BufferedReader reader = new BufferedReader(new FileReader("measurements.rtf"));
String line = null;


  line= reader.readLine(); 

  String[] dimensions = line.split("\\s");   \\ splitting the line into an array
  String widthS = dimensions[0];
  String heightS = dimensions[1];
  System.out.println(widthS);

  width = Integer.valueOf(widthS);
  height = Integer.valueOf(heightS);

  System.out.println(height + width);     

}

  catch (FileNotFoundException e){
  System.out.println("Error! D:\nFile not found.");
  System.out.println(e);
  }
  catch(Exception e){
  System.out.println("Error");   // array out of bounds exception
  System.out.println(e);
}

My text file: 10 5

1000 1001

21 13

9999 888

345 1277

Upvotes: 1

Views: 905

Answers (2)

Roberto Linares
Roberto Linares

Reputation: 2225

First, fix your code so you can really loop over all the file lines. Second check the length of the array. Third, print the line currently being read so you can se if the problem is with the file content.

Ex:

String fileName = "measurements.rtf";

BufferedReader reader;
try {
    reader = new BufferedReader(new FileReader(fileName));

    String line = null;

    while((line = reader.readLine()) != null) {
        System.out.println("Line: " + line);
        String dimensions[] = line.split("\\s");
        if(dimensions.length == 2) {
            int width = Integer.parseInt(dimensions[0]);
            int height = Integer.parseInt(dimensions[1]);

            //...
        } else {
            //wrong content in line!
        }
    }
} catch (FileNotFoundException e) {
    // Handle FileNotFoundException
} catch(IOException e) {
    // Handle IOException
} catch(ArrayIndexOutOfBoundsException e) {
    //Handle ArrayIndexOutOfBoundsException
}

Upvotes: 1

Boris Daich
Boris Daich

Reputation: 2461

your input file has empty line at the end of the file hence when "splitted"

String[] dimensions of size 1 and you get arrayIndexOutofBoundsException in the line

String heightS = dimensions[1];

Upvotes: 0

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