El método de oferta() de DelayQueue se usa para insertar un elemento específico en la cola de demora. Actúa de forma similar al método add() de DelayQueue.
Sintaxis:
public boolean offer (E e)
Parámetros:
DelayQueue acepta solo aquellos elementos que pertenecen a una clase de tipo Delayed. Entonces, este elemento E debe ser de tipo Retrasado.
Devoluciones:
este método no devuelve nada.
Excepción:
puntero nulo Excepción: si el elemento especificado es nulo.
El siguiente programa para ilustrar la oferta de DelayQueue() en Java:
Ejemplo:
Java
// Java Program Demonstrate DelayQueue offer() 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)); // Print delayqueue System.out.println("Original DelayQueue: " + DQ + "\n"); // Now insert elements using offer method DQ.offer(new DelayObject("C", 10)); DQ.offer(new DelayObject("D", 11)); DQ.offer(new DelayObject("E", 15)); DQ.offer(new DelayObject("F", 17)); // print queue System.out.println("After insertion DelayQueue: " + DQ); } }
Producción:
Original DelayQueue: [ { A, time=1545817395066}, { B, time=1545817395067}] After insertion DelayQueue: [ { A, time=1545817395066}, { B, time=1545817395067}, { C, time=1545817395076}, { D, time=1545817395077}, { E, time=1545817395081}, { F, time=1545817395083}]
Publicación traducida automáticamente
Artículo escrito por ProgrammerAnvesh y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA