Java BlockingDeque putLast()用法及代码示例

BlockingDeque的putLast(E e)方法将指定元素插入到此双端队列表示的队列中(换句话说，在此双端队列的末尾)。如果Deque受容量限制，则它将等待空间可用。

用法:

public void putLast(E e)

参数：此方法接受强制参数e，该参数是要在BlockingDeque末尾插入的元素。

返回：此方法不返回任何内容。

异常：该程序将引发两个异常，如下所示：

NullPointerException -如果指定的元素为null
InterruptedException-如果在等待时被打断

注意：： BlockingDeque的putLast()方法已从Java中的LinkedBlockingDeque类继承。

以下示例程序旨在说明BlockingDeque的putLast()方法：

程序1:

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

输出：

Blocking Deque:[7855642, 35658786, 5278367, 74381793]

程序2:

// Java Program Demonstrate putLast() 
// method of BlockingDeque 
// throwing NullPointerException 
  
import java.util.concurrent.LinkedBlockingDeque; 
import java.util.concurrent.BlockingDeque; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws InterruptedException 
    { 
  
        // create object of BlockingDeque 
        BlockingDeque<Integer> BD 
            = new LinkedBlockingDeque<Integer>(); 
  
        // Add numbers to end of BlockingDeque 
        BD.putLast(7855642); 
        BD.putLast(35658786); 
        BD.putLast(5278367); 
  
        // throws an exception 
        BD.putLast(null); 
  
        // print Dequeue 
        System.out.println("Blocking Deque:" + BD); 
    } 
}

输出：

Exception in thread "main" java.lang.NullPointerException
    at java.util.concurrent.LinkedBlockingDeque.putLast(LinkedBlockingDeque.java:390)
    at GFG.main(GFG.java:24)

程序3:

// Java Program Demonstrate putLast() 
// method of BlockingDeque 
// when capacity exceeded 
  
import java.util.concurrent.LinkedBlockingDeque; 
import java.util.concurrent.BlockingDeque; 
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws InterruptedException 
    { 
  
        // create object of BlockingDeque 
        BlockingDeque<Integer> BD 
            = new LinkedBlockingDeque<Integer>(3); 
  
        // Add numbers to end of BlockingDeque 
        BD.putLast(7855642); 
        BD.putLast(35658786); 
        BD.putLast(5278367); 
  
        // throws an exception 
        BD.putLast(4356789); 
  
        // print Dequeue 
        System.out.println("Blocking Deque:" + BD); 
    } 
}

输出：

Max real time limit exceeded due to either by heavy load on server or by using sleep function

参考： https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#putLast(E)

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注：本文由纯净天空筛选整理自gopaldave大神的英文原创作品 BlockingDeque putLast() function 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。