java - Split a string by period, but string contains float numbers -

i have string formed names (w/o spaces) separated periods. each token (after period) can start [a-za-z_] or [ (and ends ]) or $ (and ends $).

examples:

• house.car.[0].flower
• house.car.$something$
• house.car2.$4.45$.[0]
• house.car2.$abc.def$.[0]

so need split string period, in last 2 examples dont want split 4.45 (or abc.def). surrounded $ should not splitted.

for last 2 example want array that:

• house
• car2
• $4.45$ //fixed, sabuj hassan
• [0]

or

• house
• car2
• $abc.def$
• [0]

i have tried use regex, i'm wrong.

---

i informed after closing $ there could string surrounded < , > can again contain dots should not split:

• house.car.$abc.def$<ghi.jk>.[0].bla

and need like:

• house
• car
• $abc.def$<ghi.jk>
• [0]
• bla

thanks help.

you better off collecting results "walking" string match .find():

// note alternation private static final pattern pattern      = pattern.compile("\\$[^.$]+(\\.[^.$]+)*\\$|[^.]+");  //  public list<string> matchesforinput(final string input) {     final matcher m = pattern.matcher(input);     final list<string> matches = new arraylist<>();      while (m.find())         matches.add(m.group());      return matches; }