Java Regex split string between delimiter and keep delimiter [duplicate]

Question

I have a java string that looks like this;

(fname:jon)(lname:doe)(guaranteer: Sam (W) Willis)(age:35)(addr:1 Turnpike Plaza)(favcolor:blue)

And I want to split this String from delimiter (fname:jon)<here>(lname:doe).

I tried splitting through regex \)\( but it just breaks my code

arr = s.split("\\)\\(");
for (String a: arr) System.out.println(a);

Output

(fname:jon
lname:doe
guaranteer: Sam (W) Willis
age:35
addr:1 Turnpike Plaza
favcolor:blue)

I also looked at this question: How to split a string, but also keep the delimiters?, but it didn't helped because in my case, I want to keep the delimiter )( and split delimiter evenly as well, i.e., the first bracket should go to first result and second to second result.

The regex that i used was s.split("(?<=\\)\\()") and it gave output:

(fname:jon)(
lname:doe)(
guaranteer: Sam (W) Willis)(
age:35)(
addr:1 Turnpike Plaza)(
favcolor:blue)

This is my desired output:

(fname:jon)
(lname:doe)
(guaranteer: Sam (W) Willis)
(age:35)
(addr:1 Turnpike Plaza)
(favcolor:blue)

Answer 1

You can split your string using positive lookahead and positive lookbehind like this:

RegEx (?<=\))(?=\()

DEMO

1. (?<=\)) positive lookbehind which indicates that closing bracket should preceed the split position.
2. (?=\() positive lookahead which indicates that opening bracket should follow that split position.

Output

(fname:jon)
(lname:doe)
(guaranteer: Sam (W) Willis)
(age:35)
(addr:1 Turnpike Plaza)
(favcolor:blue)

Code

String s = "(fname:jon)(lname:doe)(guaranteer: Sam (W) Willis)(age:35)(addr:1 Turnpike Plaza)(favcolor:blue)";
String arr[] = s.split("(?<=\\))(?=\\()");
for (String a: arr) System.out.println(a);