How to create grep command in java as linux grep command

Question

I want a simple Java application which will work like linux grep command, also take input from pipeline.

Thanks

Answer 1

1st U have to check for command line args

if avail more than 2 arguments then, 1st one is radix and 2nd one is file name read file line by line, match the radix string, and print it

if command line is only 1 argument then you should check for System.in which comes from pipeline read line by line and check that single arg String as radix and print it.