Java中的LinkedBlockingDeque迭代器（）方法-yiteyi-C++库

这个 迭代器（） 方法 LinkedBlockingDeque 返回一个迭代器，该迭代器按正确的顺序遍历此数据块中的元素。元素将按从第一个（头部）到最后一个（尾部）的顺序返回。返回的迭代器是“弱一致”迭代器。

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语法：

public Iterator iterator()

参数： 此方法不接受任何参数。

返回： 这个方法返回一个迭代器，迭代器按正确的顺序遍历这个数据块中的元素。

下面的程序演示了迭代器（）方法 LinkedBlockingDeque :

项目1：

                     // Java Program Demonstrate iterator()                   
                     // method of LinkedBlockingDeque                   
                             
                     import                               java.util.concurrent.LinkedBlockingDeque;                   
                     import                               java.util.*;                   
                             
                     public                               class                               GFG {                   
                                         public                               static                               void                               main(String[] args)                   
                             
                                         {                   
                             
                                         // create object of LinkedBlockingDeque                   
                                         LinkedBlockingDeque<Integer> LBD                   
                                         =                               new                               LinkedBlockingDeque<Integer>();                   
                             
                                         // Add numbers to front of LinkedBlockingDeque                   
                                         LBD.addFirst(                               7855642                               );                   
                                         LBD.addFirst(                               35658786                               );                   
                                         LBD.addFirst(                               5278367                               );                   
                                         LBD.addFirst(                               74381793                               );                   
                             
                                         // Call iterator() method of LinkedBlockingDeque                   
                                         Iterator iteratorVals = LBD.iterator();                   
                             
                                         // Print elements of iterator                   
                                         // created from PriorityBlockingQueue                   
                                         System.out.println(                               "The iterator values"                   
                                         +                               " of LinkedBlockingDeque are:"                               );                   
                             
                                         // prints the elements using an iterator                   
                                         while                               (iteratorVals.hasNext()) {                   
                                         System.out.println(iteratorVals.next());                   
                                         }                   
                                         }                   
                     }                   

输出：

The iterator values of LinkedBlockingDeque are:
74381793
5278367
35658786
7855642

项目2：

                     // Java Program Demonstrate iterator()                   
                     // method of LinkedBlockingDeque                   
                     // when list is of strings                   
                             
                     import                               java.util.concurrent.LinkedBlockingDeque;                   
                     import                               java.util.*;                   
                             
                     public                               class                               GFG {                   
                                         public                               static                               void                               main(String[] args)                   
                             
                                         {                   
                             
                                         // create object of LinkedBlockingDeque                   
                                         LinkedBlockingDeque<String> LBD                   
                                         =                               new                               LinkedBlockingDeque<String>();                   
                             
                                         // Add numbers to front of LinkedBlockingDeque                   
                                         LBD.add(                               "Geeks"                               );                   
                                         LBD.add(                               "forGeeks"                               );                   
                                         LBD.add(                               "A"                               );                   
                                         LBD.add(                               "Computer"                               );                   
                                         LBD.add(                               "Portal"                               );                   
                             
                                         // Call iterator() method of LinkedBlockingDeque                   
                                         Iterator iteratorVals = LBD.iterator();                   
                             
                                         // Print elements of iterator                   
                                         // created from PriorityBlockingQueue                   
                                         System.out.println(                               "The iterator values"                   
                                         +                               " of LinkedBlockingDeque are:"                               );                   
                             
                                         // prints the elements using an iterator                   
                                         while                               (iteratorVals.hasNext()) {                   
                                         System.out.println(iteratorVals.next());                   
                                         }                   
                                         }                   
                     }                   

输出：

The iterator values of LinkedBlockingDeque are:
Geeks
forGeeks
A
Computer
Portal

参考： https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/LinkedBlockingDeque.html#iterator()

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