This bug was originally reported by Steven Buroff <###@###.###>,
who noticed that LineNumberReader throws an IOException when used on the Win32
console input stream. Here is a simplified example, which shows that the
problem really is that available() isn't supported by the console input stream.


import java.io.*;

public class ISRAvailable {

    public static void main(String[] args) {
InputStreamReader isr = new InputStreamReader(System.in);
int c;

try {
c = isr.read();
}
catch(IOException excp) {
excp.printStackTrace();
}
    }

}


Under Win32:

F:\bugs\io>p:\w\jdk\build\win32\bin\java ISRAvailable
java.io.IOException
        at java.io.BufferedInputStream.available(BufferedInputStream.java:181)
        at java.io.InputStreamReader.fill(InputStreamReader.java:216)
        at java.io.InputStreamReader.read(InputStreamReader.java:273)
        at java.io.InputStreamReader.read(InputStreamReader.java:249)
        at ISRAvailable.main(ISRAvailable.java:33)
F:\bugs\io>