Prime factor problem

Question

hey guys I got another java problem (go figure).
anyway heres the basic steps
1. take as input the path to a file containing one integer per line
2.for each integer in the file, output to the console a comma-delimited list of the integer's prime factors
3.the list of integers on each line of the output should multiply to produce the input integer
4.include unit tests for the code
basically im kind of at a loss of where to start. like is the first 1 asking me to ask for just one integer or as many as I put down?

Answer 1

well i changed that and tried to compile it but then it gave me this message. Class names 'primefactor' are only accepted if annonation processing is explicitly requested. heres the code.
public class primefactor
  public primefactor()
  public static void main(String[] args)
    primefactor factorEx = new primefactor();
    factorEx.FindAndPrint(50);
  public void FindAndPrint(int n)
    int totalCols=8;
    for (int i = 1; i <= n; i++)
      int countFactor = 0;
      for (int j = 2; j <= (i / 2); j++)
        if ((i % j) == 0)
          countFactor++;
      for (int j = 0; j < totalCols; j++)
        if (j <= countFactor)
          System.out.print(i+",");
        } else
          System.out.print(".");
      System.out.println();
}