BlockingDeque的iterator()方法以适当的顺序在此双端队列中的元素上返回迭代器。元素将按照从头(头)到后(尾)的顺序返回。返回的迭代器是一个弱一致性迭代器。
用法:
public Iterator iterator()
参数:此方法不接受任何参数。
返回值:此方法以适当的顺序在此双端队列中的元素上返回迭代器。
注意:BlockingDeque的iterator()方法已从Java中的LinkedBlockingDeque类继承。
以下示例程序旨在说明BlockingDeque的iterator()方法:
程序1:
// Java Program Demonstrate iterator()
// 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)
{
// create object of BlockingDeque
BlockingDeque<Integer> BD
= new LinkedBlockingDeque<Integer>();
// Add numbers to front of BlockingDeque
BD.addFirst(7855642);
BD.addFirst(35658786);
BD.addFirst(5278367);
BD.addFirst(74381793);
// Call iterator() method of BlockingDeque
Iterator iteratorVals = BD.iterator();
// Print elements of iterator
// created from PriorityBlockingQueue
System.out.println("The iterator values"
+ " of BlockingDeque are:");
// prints the elements using an iterator
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The iterator values of BlockingDeque are: 74381793 5278367 35658786 7855642
程序2:
// Java Program Demonstrate iterator()
// method of BlockingDeque
// when list is of strings
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.BlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of BlockingDeque
BlockingDeque<String> BD
= new LinkedBlockingDeque<String>();
// Add numbers to front of BlockingDeque
BD.add("Geeks");
BD.add("forGeeks");
BD.add("A");
BD.add("Computer");
BD.add("Portal");
// Call iterator() method of BlockingDeque
Iterator iteratorVals = BD.iterator();
// Print elements of iterator
// created from BlockingQueue
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 BlockingDeque are: Geeks forGeeks A Computer Portal
参考: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#iterator()
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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 iterator() 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。