java - How to split() a String while maintaining whitespace -


this question has answer here:

how split string of words , retain whitespaces?

here code: 

string words[] = s.split(" ");

string s contains: hello world

after code runs, words[] contains: "hello" "" world

ideally, should not empty string in middle, contain both whitespaces: words[] should be: "hello" " " " " world

how have result?

you use lookahead/lookbehind assertions:

string[] words = "hello  world".split("((?<=\\s+)|(?=\\s+))");

where (?<=\\s+) , (?=\\s+) zero-width groups.


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