[ACCEPTED]-What is the best way to read a text file two lines at a time in Java?-fileparsing

Accepted answer

Score: 12

Why not just read two lines?

BufferedReader in;
String line;
while ((line = in.readLine() != null) {
    processor.doStuffWith(line, in.readLine());
}

This assumes 2 that you can rely on having full 2-line 1 data sets in your input file.

Score: 10

BufferedReader in;
String line1, line2;

while((line1 = in.readLine()) != null 
   && (line2 = in.readLine()) != null))
{
    processor.doStuffWith(line1, line2);
}

Or you could concatenate them if you wanted.

Score: 0

I would refactor code to look somehow like 5 this:

RecordReader recordReader;
Processor processor;

public void processRecords() {
    Record record;

    while ((record = recordReader.readRecord()) != null) {
        processor.processRecord(record);
    }
}

Of course in that case you have to 4 somehow inject correct record reader in 3 to this class but that should not be a problem.

One 2 implementation of the RecordReader could 1 look like this:

class BufferedRecordReader implements RecordReader
{
    BufferedReader in = null;

    BufferedRecordReader(BufferedReader in)
    {
        this.in = in;
    }
    public Record readRecord()
    {
        String line = in.readLine();

        if (line == null) {
            return null;
        }

        Record r = new Record(line, in.readLine());

        return r;
    }
}

Source: stackoverflow.com

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