java - How can I parse a "key1:value1, value, key2:value3" string into ArrayLists? -

i have string

string line = "abc:xyz uvw, def:ghi, mno:rst, ijk:efg, abc opq"; 

i want parse string 2 lists:

arraylist<string> tags; arraylist<string> values; 

where tags words before colon (in example: abc, def, ijk , mno). want

tags = arrays.aslist("abc", "def", "mno", "ijk"); values = arrays.aslist("xyz uvw", "ghi", "rst", "efg, abc opq"); 

note values can have spaces , commas in them , not 1 word.

since values can contain commas, need split when find key.

a key defined word preceding :.

so, split pattern ", (?=[a-za-z]+:)" checks comma space chars colon in specified order, looking ahead chars , colon.

checks key, , splits lookahead (thus leaving key intact). give array of keyvalue pairs

then can split : keys , values.

string str = "your string"; string[] keyvaluepairs = str.split(", (?=[a-za-z]+:)"); (string keyvaluepair : keyvaluepairs) {     string[] keyvalue = keyvaluepair.split(":");     keysarray.add(keyvalue[0]);     valuesarray.add(keyvalue[1]); }