How to split this string in Java regex? -


this string:

string strpro = "(a0(a1)(a2 , on)...(an))";

content in son-() may "", or value of strpro, or pattern, recursively, sub-() sub-tree.

expected result:

str1 "a0(a1)" str2 "(a2 , on)" ... strn "(an)"

str1, str2, ..., strn e.g. elements in array

how split string?

you can use substring() rid of outer paranthesis, , split using lookbehind , lookahead (?<= , ?=): 

string strpro = "(a0(a1)(a2 , on)(an))"; string[] split = strpro.substring(1, strpro.length() - 1).split("(?<=\\))(?=\\()"); system.out.println(arrays.tostring(split));

this prints

[a0(a1), (a2 , on), (an)]


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