PriorityBlockingQueue类的iterator()方法返回对该队列中的元素进行迭代的迭代器。从此方法返回的元素不遵循任何顺序。返回的迭代器是弱一致性的。
用法:
public Iterator iterator()
参数:此方法不带任何参数。
返回:此方法返回一个迭代器,该迭代器具有与PriorityBlockingQueue中存在的元素相同的元素。
下面的程序说明PriorityBlockingQueue的iterator()方法。
范例1:
// Java Program Demonstrate iterator()
// method of PriorityBlockingQueue
import java.util.concurrent.PriorityBlockingQueue;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// define capacity of PriorityBlockingQueue
int capacityOfQueue = 5;
// create object of PriorityBlockingQueue
PriorityBlockingQueue<Integer> PrioQueue
= new PriorityBlockingQueue<Integer>(capacityOfQueue);
// Add elements to PriorityBlockingQueue
PrioQueue.add(945645);
PrioQueue.add(6468516);
PrioQueue.add(7564165);
PrioQueue.add(45616);
// print PrioQueue
System.out.println("PrioQueue:" + PrioQueue);
// Call iterator() method of PriorityBlockingQueue
Iterator iteratorVals = PrioQueue.iterator();
// Print elements of iterator
// created from PriorityBlockingQueue
System.out.println("The iterator values"
+ " of PriorityBlockingQueue are:");
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
PrioQueue:[45616, 945645, 7564165, 6468516] The iterator values of PriorityBlockingQueue are: 45616 945645 7564165 6468516
范例2:为了说明PriorityBlockingQueue的iterator()方法,该方法包含名称列表。
// Java Program Demonstrate iterator()
// method of PriorityBlockingQueue
import java.util.concurrent.PriorityBlockingQueue;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// define capacity of PriorityBlockingQueue
int capacityOfQueue = 5;
// create object of PriorityBlockingQueue
PriorityBlockingQueue<String> names
= new PriorityBlockingQueue<String>(capacityOfQueue);
// Add names of students of girls college
names.add("Geeks");
names.add("forGeeks");
names.add("A");
names.add("Computer");
names.add("Portal");
// Call iterator() method of PriorityBlockingQueue
Iterator iteratorVals = names.iterator();
// Print elements of iterator
// created from PriorityBlockingQueue
System.out.println("The Names are:");
while (iteratorVals.hasNext()) {
System.out.println(iteratorVals.next());
}
}
}
输出:
The Names are: A Computer Geeks forGeeks Portal
相关文章:
参考:
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/PriorityBlockingQueue.html#iterator-
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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 PriorityBlockingQueue iterator() method in Java。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。