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() 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 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