The remainingCapacity() method of DelayQueue always returns Integer.MAX_VALUE because a DelayQueue is not capacity constrained. That means, irrespective of the size of the DelayQueue it returns same result, i.e. Integer.MAX_VALUE.
Syntax:
public int remainingCapacity ()
Return Value: The function returns Integer.MAX_VALUE.
Exception: No exceptions are present.
Below programs illustrate the DelayQueue.remainingCapacity() method:
Program:
Java
// Java Program Demonstrate DelayQueue remainingCapacity() methodimport java.util.concurrent.*;import java.util.*;// The DelayObject for DelayQueue// It must implement Delayed and// its getDelay() and compareTo() methodclass 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 Classpublic 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 the size of DelayQueue System.out.println("Size of the DelayQueue: " + DQ.size()); // remainingCapacity() method always returns Integer.MAX_VALUE System.out.println("DelayQueue Remaining Capacity:" + DQ.remainingCapacity()); // poll() method for removing head of the DelayQueue DQ.poll(); // print the size of DelayQueue System.out.println("Size of the DelayQueue: " + DQ.size()); // remainingCapacity() method always returns Integer.MAX_VALUE System.out.println("DelayQueue Remaining Capacity:" + DQ.remainingCapacity()); // poll() method for removing head of the DelayQueue DQ.poll(); // print the size of DelayQueue System.out.println("Size of the DelayQueue: " + DQ.size()); // remainingCapacity() method always returns Integer.MAX_VALUE System.out.println("DelayQueue Remaining Capacity:" + DQ.remainingCapacity()); }} |
Output:
Size of the DelayQueue: 2 DelayQueue Remaining Capacity:2147483647 Size of the DelayQueue: 1 DelayQueue Remaining Capacity:2147483647 Size of the DelayQueue: 0 DelayQueue Remaining Capacity:2147483647
