java - How to inform other objects(how to "close" queue) that there will be no more elements in ArrayBlockingQueue, -

i have arrayblockingqueue<string> queue; , author object puts elements in there:

public static final string end = "db8097f51282a0188e988d6bfa994430258e24ce";  [...]  (string text : texts) {             queue.put(text);             thread.sleep(300);         } queue.put(end); 

and printer objects takes elements qeue , prints them on console:

 string text;  {      text = queue.take();      if (!text.equals(author.end))             system.out.println(text); } while (tekst != author.end); 

i wanted inform printer object there no more elements put qeue. cannot pass null arrayblockingqueue decided pass unusual string inside. think bad solution.

can somehow close arrayblockingqueue?

your solution seems fine. 2 points consider:

• if you're going have more 1 printer reading values off of same queue may want printer push end value queue other printers chance see it
• consider storing not plain string instead object of class define. class can have string field carry actual payload , additional boolean field such 'isend`. make distinction between regular items , end-of-queue item more explicit in code.