Count matches. Develop a program that counts the number of substrings m standard input that match the RE on the command line, without worrying about overlapping matches (use Pattern and Matcher as in the previous exercise).
Previous Exercise
Harvester. A Java Pattern object is a representation of a regular expression. Such an object can be used to build a Matcher object for a given string. You can think of a Matcher object as a representation of an NFA for the RE. Operations on Matcher objects include find(), which finds the next match of the RE in the string, and group(), which returns the string characters that led to the match. Write a Pattern and Matcher client that takes a file name (or URL) and an RE as command-line inputs and prints out all the substrings in a file that match the RE.
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