How to write to stdout and read from stdin using unix pipe = '|'

Question

Hi,
How can I read the output written by 1 program to stdout as the input
(from stdin) to another program?
Example:
$java pgm1 | pgm2
pgm1's output is of multiple lines with tab delimited words in each line. I need to know when each line ends as well.
Thanks,
-Ambika

Answer 1

I tried reading from System.in - using a Buffered reader and the readline() method as follows:
BufferedReader buffIn = new BufferedReader(new InputStreamReader(System.in));
while(!(get= buffIn.readLine()).equalsIgnoreCase("")){
System.out.println("get:<"+get+">");
but unless I explicitly use the keyboard (type), it doesn't seem to be able to read input.
I also tried to use
Properties.load(System.in) - which is really what I'd love to be able to do to reduce processing on my end - but no luck there either!
Is there anything I need to set the System.in or something?