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>