El método iterator () de DelayQueue se usa para devolver un iterador sobre todos los elementos en DelayQueue. Estos elementos pueden estar vencidos o no vencidos.
Sintaxis:
public Iterator iterator ()
Parámetros: Este método no acepta ningún parámetro.
Devoluciones: este método devuelve un iterador sobre los elementos de esta cola de retraso.
Debajo del programa para ilustrar DelayQueue iterator() en Java:
Ejemplo:
Java
// Java Program Demonstrate DelayQueue iterator() method import java.util.concurrent.*; import java.util.*; // The DelayObject for DelayQueue // It must implement Delayed and // its getDelay() and compareTo() method class DelayObject implements Delayed { private String name; private long time; // Constructor of DelayObject public DelayObject(String name, long delayTime) { this.name = name; this.time = System.currentTimeMillis() + delayTime; } // Implementing getDelay() method of Delayed @Override public long getDelay(TimeUnit unit) { long diff = time - System.currentTimeMillis(); return unit.convert(diff, TimeUnit.MILLISECONDS); } // Implementing compareTo() method of Delayed @Override public int compareTo(Delayed obj) { if (this.time < ((DelayObject)obj).time) { return -1; } if (this.time > ((DelayObject)obj).time) { return 1; } return 0; } // Implementing toString() method of Delayed @Override public String toString() { return "\n{" + " " + name + ", time=" + time + "}"; } } // Driver Class public class GFG { public static void main(String[] args) throws InterruptedException { // create object of DelayQueue // using DelayQueue() constructor BlockingQueue<DelayObject> DQ = new DelayQueue<DelayObject>(); // Add numbers to end of DelayQueue // using add() method DQ.add(new DelayObject("A", 1)); DQ.add(new DelayObject("B", 2)); DQ.add(new DelayObject("C", 3)); DQ.add(new DelayObject("D", 4)); // Creating an iterator Iterator val = DQ.iterator(); // print the value after iterating DelayQueue System.out.println("The iterator values are: "); while (val.hasNext()) { System.out.println(val.next()); } } }
Producción:
The iterator values are: { A, time=1545818784540} { B, time=1545818784541} { C, time=1545818784542} { D, time=1545818784543}
Publicación traducida automáticamente
Artículo escrito por ProgrammerAnvesh y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA