Java中的 ConcurrentLinkedQueue remove() 方法

ConcurrentLinkedQueue的remove(Object o)方法用于从该 ConcurrentLinkedQueue 中移除指定元素的单个实例（如果存在）。如果此 ConcurrentLinkedQueue 包含一个或多个这样的元素，则此方法删除元素 e 使得 o.equals(e)。如果此 ConcurrentLinkedQueue 包含指定的元素，Remove() 方法将返回 true，否则将返回 false。

句法：

public boolean remove(Object o)

参数：此方法采用参数o ，该参数表示要从此 ConcurrentLinkedQueue 中删除的元素。

返回：如果此 ConcurrentLinkedQueue 包含指定元素并被删除，则此方法返回true 。

下面的程序说明了 ConcurrentLinkedQueue 的 remove() 方法：

示例 1：

// Java Program Demonstrate remove()
// method of ConcurrentLinkedQueue
  
import java.util.concurrent.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create an ConcurrentLinkedQueue
        ConcurrentLinkedQueue
            queue = new ConcurrentLinkedQueue();
  
        // Add Numbers to queue
        queue.add(4353);
        queue.add(7824);
        queue.add(78249);
        queue.add(8724);
  
        // Displaying the existing ConcurrentLinkedQueue
        System.out.println("ConcurrentLinkedQueue: " + queue);
  
        // apply remove() for Number 78249
        boolean response = queue.remove(78249);
  
        // print results
        System.out.println("Removing Number 78249 successful: " + response);
  
        // Displaying the existing ConcurrentLinkedQueue
        System.out.println("Updated ConcurrentLinkedQueue: " + queue);
    }
}

输出：

ConcurrentLinkedQueue: [4353, 7824, 78249, 8724]
Removing Number 78249 successful: true
Updated ConcurrentLinkedQueue: [4353, 7824, 8724]

示例 2：

// Java Program Demonstrate remove()
// method of ConcurrentLinkedQueue
  
import java.util.concurrent.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create an ConcurrentLinkedQueue
        ConcurrentLinkedQueue
            queue = new ConcurrentLinkedQueue();
  
        // Add String to queue
        queue.add("Aman");
        queue.add("Amar");
        queue.add("Sanjeet");
        queue.add("Rabi");
  
        // Displaying the existing ConcurrentLinkedQueue
        System.out.println("ConcurrentLinkedQueue: " + queue);
  
        // apply remove() on queue
        boolean response1 = queue.remove("Aman");
  
        // print after applying poll method
        System.out.println("Removing String \"Aman\" successful: " + response1);
  
        // Displaying the existing ConcurrentLinkedQueue
        System.out.println("Updated ConcurrentLinkedQueue: " + queue);
  
        // apply remove() on queue
        boolean response2 = queue.remove("Kisan");
  
        // print after applying poll method
        System.out.println("Removing String \"Kisan\" successful: " + response2);
  
        // Displaying the existing ConcurrentLinkedQueue
        System.out.println("Updated ConcurrentLinkedQueue: " + queue);
    }
}

输出：

ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi]
Removing String "Aman" successful: true
Updated ConcurrentLinkedQueue: [Amar, Sanjeet, Rabi]
Removing String "Kisan" successful: false
Updated ConcurrentLinkedQueue: [Amar, Sanjeet, Rabi]

参考： https: Java/util/concurrent/ConcurrentLinkedQueue.html#remove-java.lang.Object-