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I'm trying to compare lines in two different files. The basic idea is I want to take line 1 of file 1 and compare it to all the lines of file 2 and print the results into a third file, then do the next line of file 1 and repeat … 
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Is there something in Java that will perform the + or - operation? I need to compare a couple variables but the variables are not going to be exact, they'll be off by about +or- 2. 
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I have a large file to read to get the data out of the columns. File size varies, but is usually around 1000 to 3000 lines. What I need to do is pull the data(numbers) from column 3 ONLY if the number in column 4 of that same line is …
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