Reading CSV file using BufferedReader resulting in reading alternative lines

Question

I\'m trying to read a csv file from my java code. using the following piece of code:

public void readFile() throws IOException {
    BufferedReader         


        

Answer 1

In java 8, we can easily achieve it

InputStream is = new ByteArrayInputStream(byteArr);
BufferedReader br = new BufferedReader(new InputStreamReader(is));
List<List<String>> dataList = br.lines()
           .map(k -> Arrays.asList(k.split(",")))
           .collect(Collectors.toCollection(LinkedList::new));

outer list will have rows and inner list will have corresponding column values

Answer 2

You need to remove the first line in a loop body newLine = br.readLine();

Answer 3

The first time you're reading the line without processing it in the while loop, then you're reading it again but this time you're processing it. readLine() method reads a line and displaces the reader-pointer to the next line in the file. Hence, every time you use this method, the pointer will be incremented by one pointing to the next line.

This:

 while ((newLine = br.readLine()) != null) {
        newLine = br.readLine();
        System.out.println(newLine);
        lines.add(newLine);
    }

Should be changed to this:

 while ((newLine = br.readLine()) != null) {
        System.out.println(newLine);
        lines.add(newLine);
    }

Hence reading a line and processing it, without reading another line and then processing.