Read-File Write Display substring

[hiklior]

Hi ,

I would appreciate if somebody could help me with this.

I have a txt file with more than 4000 lines. I need to find a substring of 35 zeros '00000000000000000000000000000000000' and they could be in more than one place. This program should actually read from file to find those substring . If it find 35 zeros i need 10 digits in front of it for example if there was 15151515150000000000000000000000000000000000 i need 1515151515.This program should write those ten digits in a separate file in new line.

example output

1515151515
1616161616
1717171717

I am new to java . just learning i would appreciate anykind of help i could get.

[Eranga]

Hi hiklior,

Welcome to our community!

How about the arrangement of a single line. I mean is there fix number of digits?

What you have try up to now?

[sukatoa]

Have an experiment on Matcher class and Pattern class...

It is useful...

regards,
sukatoa

[Eranga]

Quote:

Originally Posted by sukatoa

Have an experiment on Matcher class and Pattern class...

It is useful...

regards,
sukatoa

Yep, but sukatoa, if he doesn't know how to read a line from a file and write the result to a file Isn't it, going to be too difficult.