Java中的 PriorityBlockingQueue remove() 方法

PriorityBlockingQueue的remove(Object o)方法用于从该队列中删除一个元素。此方法删除作为参数传递的元素的单个实例（如果存在） 。
当且仅当元素被移除时，它返回 true，否则返回 false。

句法：

public boolean remove(Object o)

参数：此方法接受一个强制参数o ，它是要从此队列中删除的元素（如果存在）。

返回值：如果指定的元素被成功删除，此方法返回true 。否则此方法返回false 。

下面的程序说明了 PriorityBlockingQueue 中的 remove() 方法：

方案一：

// Java Program Demonstrate remove()
// method of PriorityBlockingQueue
  
import java.util.concurrent.PriorityBlockingQueue;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create object of PriorityBlockingQueue
        PriorityBlockingQueue pbq
            = new PriorityBlockingQueue();
  
        // Add element to PriorityBlockingQueue
        pbq.put(1);
        pbq.put(2);
        pbq.put(3);
        pbq.put(4);
  
        // print queue
        System.out.println("Queue: " + pbq);
  
        // remove 2
        boolean res = pbq.remove(2);
        System.out.println("\n2 removed: " + res);
  
        // print queue
        System.out.println("Queue:  " + pbq);
  
        // remove 5
        res = pbq.remove(5);
        System.out.println("\n5 removed: " + res);
  
        // print queue
        System.out.println("Queue:  " + pbq);
    }
}

输出：

Queue: [1, 2, 3, 4]

2 removed: true
Queue:  [1, 4, 3]

5 removed: false
Queue:  [1, 4, 3]

// Java Program Demonstrate remove()
// method of PriorityBlockingQueue
  
import java.util.concurrent.PriorityBlockingQueue;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create object of PriorityBlockingQueue
        PriorityBlockingQueue pbq
            = new PriorityBlockingQueue();
  
        // Add element to PriorityBlockingQueue
        pbq.put("Geeks");
        pbq.put("forGeeks");
        pbq.put("A Computer");
        pbq.put("Portal");
  
        // print queue
        System.out.println("Queue: " + pbq);
  
        // remove Geeks
        boolean res = pbq.remove("Geeks");
        System.out.println("\nGeeks removed: " + res);
  
        // print queue
        System.out.println("Queue:  " + pbq);
  
        // remove SandeepJain
        res = pbq.remove("SandeepJain");
        System.out.println("\nSandeepJain removed: " + res);
  
        // print queue
        System.out.println("Queue:  " + pbq);
    }
}

输出：

Queue: [A Computer, Portal, Geeks, forGeeks]

Geeks removed: true
Queue:  [A Computer, Portal, forGeeks]

SandeepJain removed: false
Queue:  [A Computer, Portal, forGeeks]