Java DelayQueue remainingCapacity()用法及代码示例

DelayQueue的remainingCapacity()方法始终返回Integer.MAX_VALUE，因为DelayQueue不受容量限制。这意味着，无论DelayQueue的大小如何，它都会返回相同的结果，即Integer.MAX_VALUE。

用法:

public int remainingCapacity ()

返回值：该函数返回Integer.MAX_VALUE。

异常：没有例外。

以下示例程序旨在说明DelayQueue.remainingCapacity()方法：

程序：

// Java Program Demonstrate DelayQueue remainigCapacity() 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; 
  
    // Contructor 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()); 
  
        // remainigCapacity() 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()); 
        // remainigCapacity() 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()); 
        // remainigCapacity() method always returns Integer.MAX_VALUE 
        System.out.println("DelayQueue Remaining Capacity:"
                           + DQ.remainingCapacity()); 
    } 
}

输出：

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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注：本文由纯净天空筛选整理自ProgrammerAnvesh大神的英文原创作品 DelayQueue remainingCapacity() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。