Control M at the end of the line

Question

This is the peace of my code in parsing the file line by line.
BufferedReader br = new BufferedReader(new FileReader(file));
char[] chars = new char[500];
String temp = new String(chars);
if ((temp.trim()).length() == 0) {
     throw new Exception("File is empty");
}It started throwing the exception. But when I opened the file it wasn't empty it did have data in it. When I opened the file in binary I can see a CONTROL M at the end of each line. So why can't I read it?
thanks,

Answer 1

Client will upload their files on the Unix box,
then I will parse them and ftp them in FB with a record size of 490.
In this parsing I have to eliminate LF only, CR/LF etc and
also allow the with vo CR or LF. Finally error out if it has data which
is more/less bytes than 490.
This is the whole process, here is only the first few lines of code and
this is where it blows up.
BufferedReader br = new BufferedReader(new FileReader(file));
char[] chars = new char[500];
br.mark(510);
br.read(chars);
br.reset();
String temp = new String(chars);
if ((temp.trim()).length() == 0) {
     throw new Exception("File is empty");
}When I opened all the client file which did blow,
I observerd that control M is in all of those.