Java: String split(): I want it to include the empty strings at the end [duplicate]

use str.split("\n", -1) (with a negative limit argument). When split is given zero or no limit argument it discards trailing empty fields, and when it's given a positive limit argument it limits the number of fields to that number, but a negative limit means to allow any number of fields and not discard trailing empty fields. This is documented here and the behavior is taken from Perl.

The one-argument split method is specified to ignore trailing empty string splits but the version that takes a "limit" argument preserves them, so one option would be to use that version with a large limit.

String strArray[] = str.split("\n", Integer.MAX_VALUE);

Personally, I like the Guava utility for splitting:

System.out.println(Iterables.toString(
   Splitter.on('\n').split(input)));

Then if you want to configure empty string behaviour, you can do so:

System.out.println(Iterables.toString(
   Splitter.on('\n').omitEmptyStrings().split(input)));