public class Producer implements Runnable { private final String id; private final Queue queue; public Producer(String id, Queue q) { this.id = id; queue = q; } public void run() { while (true) { String message = produce(); System.out.println("Prod. " + id + ": inserisco " + message); queue.put(message); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } private int counter = 0; public String produce() { counter++; return "Messaggio da " + id + " n. " + counter; } }