Java 中的 DelayQueue remainingCapacity()方法，示例
原文:https://www . geeksforgeeks . org/delay queue-remainingcapacity-method-in-Java-with-examples/
延迟队列的剩余空间()方法总是返回整数。最大值因为延迟队列不受容量限制。这意味着，不管延迟队列的大小如何，它都会返回相同的结果，即整数。最大值。
语法:
public int remainingCapacity ()
返回值:函数返回整数。最大值。 异常:无异常。
下面的程序说明了 DelayQueue.remainingCapacity()方法:
程序:
Java 语言(一种计算机语言，尤用于创建网站)
// 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
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