Java BlockingDeque remove()用法及代碼示例

BlockingDeque的remove()方法刪除了Deque容器的頭部。如果Deque容器為空，則此方法引發NoSuchElementException。如果在參數中傳遞了元素，則它將刪除給定元素(如果存在於雙端隊列中)。

用法:

public E remove() or boolean remove(element)

參數：此方法接受一個臨時參數element ，該元素將從BlockingDeque中刪除

返回值：如果傳遞了參數，則此方法返回true或false，否則不返回任何內容。如果元素在雙端隊列中存在，則返回true，否則返回false。

異常：如果Deque為空，則該函數將引發NoSuchElementException。

注意：BlockingDeque的remove()方法已從Java中的LinkedBlockingDeque類繼承。

以下示例程序旨在說明BlockingDeque的remove()方法：

示例1:

// Java Program Demonstrate remove() 
// 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) 
        throws InterruptedException 
    { 
  
        // create object of BlockingDeque 
        BlockingDeque<Integer> BD 
            = new LinkedBlockingDeque<Integer>(); 
  
        // Add numbers to end of BlockingDeque 
        BD.add(7855642); 
        BD.add(35658786); 
        BD.add(5278367); 
        BD.add(74381793); 
  
        // print Deque 
        System.out.println("Blocking Deque: " + BD); 
  
        // removes the front element 
        BD.remove(); 
        System.out.println("Blocking Deque: " + BD); 
  
        // removes the element 
        BD.remove(5278367); 
        System.out.println("Blocking Deque: " + BD); 
    } 
}

輸出：

Blocking Deque: [7855642, 35658786, 5278367, 74381793]
Blocking Deque: [35658786, 5278367, 74381793]
Blocking Deque: [35658786, 74381793]

示例2:

// Java Program Demonstrate remove() 
// 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) 
        throws InterruptedException 
    { 
  
        // create object of BlockingDeque 
        BlockingDeque<Integer> BD 
            = new LinkedBlockingDeque<Integer>(); 
  
        // Add numbers to end of BlockingDeque 
        BD.add(7855642); 
        BD.add(35658786); 
        BD.add(5278367); 
        BD.add(74381793); 
  
        // print Deque 
        System.out.println("Blocking Deque: " + BD); 
  
        BD.clear(); 
  
        // removes the front element 
        BD.remove(); 
        System.out.println("Blocking Deque: " + BD); 
  
        // removes the element 
        BD.remove(5278367); 
        System.out.println("Blocking Deque: " + BD); 
    } 
}

輸出：

Exception in thread "main" java.util.NoSuchElementException
    at java.util.concurrent.LinkedBlockingDeque.removeFirst(LinkedBlockingDeque.java:453)
    at java.util.concurrent.LinkedBlockingDeque.remove(LinkedBlockingDeque.java:672)
    at GFG.main(GFG.java:29)

參考： https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#remove()

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注：本文由純淨天空篩選整理自gopaldave大神的英文原創作品 BlockingDeque remove() method in Java with Examples。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。