How to execute Two while loops containing the same condition in Java?

Vote count:

0

Hello java programmars,

I am using the java OpenCSV library to read and then write a new file. The requirement is to write a "@" symbol at the end of each line except the last line. I am succeeded with adding "@" after each line but the last line must not contain "@". A part of my java program program is as follows:

   //A part of my java code
    String[] endOfLine;
    String[] nextLine;
    int endLine = 0;
    int lineNumber = 0;
   //To get how many line are in the input file
    while ((endOfLine = reader.readNext()) != null) {
        endLine++;
    }
    //for 8 lines endLine is 8 here - which is ok
    //Now I want to pass this in next while loop - which is also ok

    while ((nextLine = reader.readNext()) != null) {
       lineNumber++;
        channel_temp = nextLine[5];

       if (lineNumber == endLine)
        {
        //Build a new string with all our required data
        String newdata = channel_temp;
        writer.writeNext(newdata);
        System.out.println(newdata);

        }
        else 
        {
            String newdata2 = channel_temp+"@";
            writer.writeNext(newdata2);
            System.out.println(newdata2);
        }
      }
      System.out.println("lineNumber: " + lineNumber);
      System.out.println("endLine: " + endLine);

The program shows the output as:

      lineNumber: 0
      endLine: 8

So, why my while loop is not upadating lineNumber value? In which part I am wrong?

asked 1 min ago

Nazmul Hossain

1

How to execute Two while loops containing the same condition in Java?