Java PriorityBlockingQueue iterator()用法及代碼示例

PriorityBlockingQueue類的iterator()方法返回對該隊列中的元素進行迭代的迭代器。從此方法返回的元素不遵循任何順序。返回的迭代器是弱一致性的。

用法:

public Iterator iterator()

參數：此方法不帶任何參數。

返回：此方法返回一個迭代器，該迭代器具有與PriorityBlockingQueue中存在的元素相同的元素。

下麵的程序說明PriorityBlockingQueue的iterator()方法。

範例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()); 
        } 
    } 
}

輸出：

PrioQueue:[45616, 945645, 7564165, 6468516]
The iterator values of PriorityBlockingQueue are:
45616
945645
7564165
6468516

範例2：為了說明PriorityBlockingQueue的iterator()方法，該方法包含名稱列表。

// 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()); 
        } 
    } 
}

輸出：

The Names are:
A
Computer
Geeks
forGeeks
Portal

相關用法

注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 PriorityBlockingQueue iterator() method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。