Java PriorityBlockingQueue spliterator()用法及代碼示例

PriorityBlockingQueue的spliterator()方法返回與PriorityBlockingQueue相同的元素的分隔符。返回的迭代器是弱一致性的。它可以與Java 8中的Streams一起使用。它也可以單獨和批量遍曆元素。Spliterator是遍曆元素的更好方法，因為它提供了對元素的更多控製。

用法:

public Spliterator spliterator()

返回值：此方法在PriorityBlockingQueue中的元素上返回一個Spliterator。

下麵的程序說明PriorityBlockingQueue的spliterator()方法：

示例1:程序來演示PriorityBlockingQueue上的spliterator()方法，該方法包含數字列表。

// Java Program Demonstrate spliterator() 
// 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 numbers to PriorityBlockingQueue 
        PrioQueue.put(7855642); 
        PrioQueue.put(35658786); 
        PrioQueue.put(5278367); 
        PrioQueue.put(74381793); 
        PrioQueue.put(76487590); 
        PrioQueue.put(87625142); 
  
        // create Spliterator of PrioQueue 
        // using spliterator() method 
        Spliterator<Integer> numbers = PrioQueue.spliterator(); 
  
        // print result from Spliterator 
        System.out.println("list of Numbers:"); 
  
        // forEachRemaining method  of Spliterator 
        numbers.forEachRemaining((n) -> System.out.println(n)); 
    } 
}

輸出：

list of Numbers:
5278367
35658786
7855642
74381793
76487590
87625142

示例2:程序來演示PriorityBlockingQueue上的spliterator()方法，該方法包含名稱列表。

// Java Program Demonstrate spliterator() 
// 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 which contains 
        // name of students 
        PriorityBlockingQueue<String> names 
            = new PriorityBlockingQueue<String>(capacityOfQueue); 
  
        // Add names of students of girls college 
        names.add("Joyita"); 
        names.add("Priyanka"); 
        names.add("Joydeep"); 
  
        // create Spliterator of PrioQueue 
        // using spliterator() method 
        Spliterator<String> list = names.spliterator(); 
  
        // print result from Spliterator 
        System.out.println("list of Names:"); 
  
        // forEachRemaining method  of Spliterator 
        list.forEachRemaining((n) -> System.out.println(n)); 
    } 
}

輸出：

list of Names:
Joydeep
Priyanka
Joyita

參考： https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/PriorityBlockingQueue.html#spliterator–

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