FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
The LineNumberReader's read() and readLine() methods normalize the new-line characters to '\n' before returning the characters read. But the read(char[] cbuf, int off, int len) method does not normalize the new-line characters.

For example, a file created on windows, with the following text:
[[
hello
dear
]]
...has 9 visible characters and 2 invisible new-line characters viz. \r\n

When such a file is read using LineNumberReader's read() or readLine(), the total number of characters read is 10 -- i.e. 9 visible chars + 1 new-line char \n

But when the same file is read using LineNumberReader's read(char[] cbuf, int off, int len) method the total numer of characters read is 11 -- i.e. 9 visible + 2 new-line chars \r\n

This behaviour seems to be a bug

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the following program to reproduce:
[[
import java.io.*;

public class LineNumberReaderBug {

    public static void main(String[] args) throws Exception {

        LineNumberReader lnr = new LineNumberReader(new InputStreamReader(new FileInputStream(args[0])));

        char[] buffer = new char[2048];
        int charsRead = lnr.read(buffer);
        System.out.println("reading using LineNumberReader.read(char[] cbuf, int off, int len)...");
        System.out.println("Chars read="+charsRead);
        System.out.println("[["+new String(buffer, 0, charsRead)+"]]");

        lnr.close();


        lnr = new LineNumberReader(new InputStreamReader(new FileInputStream(args[0])));

        StringBuffer sb = new StringBuffer();
        int ch = -1;

        while ((ch = lnr.read()) != -1) {
            sb.append((char)ch);
        }

        System.out.println("\nreading using LineNumberReader.read()...");
        System.out.println("Chars read="+sb.length());
        System.out.println("[["+sb.toString()+"]]");

        lnr.close();

    }

}
]]

Use the following input file to the above program:
[[
hello
dear
]]
...make sure the file is created on windows platform so that the new-line is \r\n.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected chars read to return 10, but it returned 11.

C:\Temp>java -showversion -classpath %CLASSPATH%;. LineNumberReaderBug input.txt
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

reading using LineNumberReader.read(char[] cbuf, int off, int len)...
Chars read=11
[[hello
dear]]

reading using LineNumberReader.read()...
Chars read=10
[[hello
dear]]


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Use the following program to reproduce:
[[
import java.io.*;

public class LineNumberReaderBug {

    public static void main(String[] args) throws Exception {

        LineNumberReader lnr = new LineNumberReader(new InputStreamReader(new FileInputStream(args[0])));

        char[] buffer = new char[2048];
        int charsRead = lnr.read(buffer);
        System.out.println("reading using LineNumberReader.read(char[] cbuf, int off, int len)...");
        System.out.println("Chars read="+charsRead);
        System.out.println("[["+new String(buffer, 0, charsRead)+"]]");

        lnr.close();


        lnr = new LineNumberReader(new InputStreamReader(new FileInputStream(args[0])));

        StringBuffer sb = new StringBuffer();
        int ch = -1;

        while ((ch = lnr.read()) != -1) {
            sb.append((char)ch);
        }

        System.out.println("\nreading using LineNumberReader.read()...");
        System.out.println("Chars read="+sb.length());
        System.out.println("[["+sb.toString()+"]]");

        lnr.close();

    }

}
]]

Use the following input file to the above program:
[[
hello
dear
]]
...make sure the file is created on windows platform so that the new-line is \r\n.

---------- END SOURCE ----------