String Joiner help needed in Java -

i need in string joiners , want append to_date before string , format after string..

public static stringjoiner inputdatestoquery(         list<filesubmtretrlstatus> filesubmtretrlstatus) {     stringjoiner joinnames = new stringjoiner(",", "to_date('", "','yyyy-mm-dd hh24:mi:ss')");   // passing comma(,) , square-brackets delimiter        (filesubmtretrlstatus status : filesubmtretrlstatus) {         joinnames.add(status.getfilesubretdatetime());         }     return joinnames; 

but out put coming below..

to_date('2017-04-13 11:18:16,2017-04-13 11:17:44,2017-04-13 10:16:07', 'yyyy-mm-dd hh24:mi:ss') 

but should below...

to_date('2017-04-13 11:18:16,'yyyy-mm-dd hh24:mi:ss'), to_date('2017-04-13 11:17:44,'yyyy-mm-dd hh24:mi:ss'), to_date('2017-04-13 10:16:07,'yyyy-mm-dd hh24:mi:ss') 

stringjoiner produces one output string. example code in documentation is:

the string "[george:sally:fred]" may constructed follows:

stringjoiner sj = new stringjoiner(":", "[", "]"); sj.add("george").add("sally").add("fred"); string desiredstring = sj.tostring(); 

i.e. takes items add(), separates them delimiter (in case, comma), , when call tostring() puts prefix @ beginning of full string, , suffix @ end.

if want use stringjoiner, need separate 1 each entry want output. might want @ formatter or stringbuilder instead.