Question

I have a file and I want to read in the string on each line. If the line does not end in CRLF (\r\n), I want to to print something. I made this file by redirecting output from print commands similar to the following.

System.out.println("Test\r\n");

But when I read this line in from the file using buffered reader, it doesn’t seem like it catches the CRLF.

I use the following to detect the crlf (where inputline is the line that has been read in).

if(inputline.indexOf("\r\n")<0)

It never detects the \r\n. How can I remedy this? Is this an issue with buffered reader?

Answer 1

readLine

public String readLine()
throws IOException

Read a line of text. A line is considered to be terminated by any one of a line feed (‘\n’), a carriage return (‘\r’), or a carriage return followed immediately by a linefeed.

Returns:

A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached

from http://docs.oracle.com/javase/7/docs/api/java/io/BufferedReader.html

Thus you may need to write some of your own code (or take this, borrowed from http://www.coderanch.com/t/276442//java/Reading-file-byte-array)

private byte[] toByteArray(File file) throws FileNotFoundException, IOException{  
    int length = (int) file.length();  
    byte[] array = new byte[length];  
    InputStream in = new FileInputStream(file);  
    int offset = 0;  
    while (offset < length) {  
        offset += in.read(array, offset, (length - offset));  
    }  
    in.close();  
    return array;  
    }

This will give you all the bytes – nothing stripped. Knock yourself out looking for \r\n…