Java LinkedBlockingDeque remainingCapacity()方法

LinkedBlockingDeque 的 remainCapacity() 方法返回这个deque在理想情况下（在没有内存或资源限制的情况下）可以接受的额外元素的数量，而不会出现阻塞。

remainingCapacity() = final_size() – current_size()

语法

public int remainingCapacity()

参数： 该方法不接受任何参数。

返回： 该方法返回可以插入deque容器中的剩余元素数量。

下面的程序说明了LinkedBlockingDeque的reservedCapacity()方法。

程序1 :

// Java Program Demonstrate remainingCapacity()
// method of LinkedBlockingDeque
// when initial size is mentioned
  
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
        throws InterruptedException
    {
  
        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD
            = new LinkedBlockingDeque<Integer>(6);
  
        // Add numbers to end of LinkedBlockingDeque
        LBD.add(7855642);
        LBD.add(35658786);
        LBD.add(5278367);
        LBD.add(74381793);
  
        // print Dequeue
        System.out.println("Linked Blocking Deque: " + LBD);
        System.out.println("remainingCapacity = : " + 
                              LBD.remainingCapacity());
    }
}

输出:

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
remainingCapacity = : 2

示例2

// Java Program Demonstrate remainingCapacity()
// method of LinkedBlockingDeque
// when no initial size is mentioned
  
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
        throws InterruptedException
    {
  
        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD
            = new LinkedBlockingDeque<Integer>(6);
  
        // Add numbers to end of LinkedBlockingDeque
        LBD.add(7855642);
        LBD.add(35658786);
        LBD.add(5278367);
        LBD.add(74381793);
  
        // print Dequeue
        System.out.println("Linked Blocking Deque: " + LBD);
        System.out.println("remainingCapacity = " + 
                             LBD.remainingCapacity());
    }
}

输出:

Linked Blocking Deque: [7855642, 35658786, 5278367, 74381793]
remainingCapacity = 2

参考资料: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/LinkedBlockingDeque.html#remainingCapacity-