Java中PriorityBlockingQueue的remove()方法

PriorityBlockingQueue的 remove(Object o) 方法用于从队列中删除一个元素。如果该方法 找到指定的元素并删除它，返回值为true ；否则返回false。

语法:

public boolean remove(Object o)

参数: 该方法接受一个名为o的参数。如果该队列中存在，则从队列中删除该元素。

返回值: 如果元素成功删除，则该方法返回true。否则返回false。

下面的程序演示了PriorityBlockingQueue中的remove()方法:

程序1:

// 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<Integer> pbq
            = new PriorityBlockingQueue<Integer>();
  
        // 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);
    }
}

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<String> pbq
            = new PriorityBlockingQueue<String>();
  
        // 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);
    }
}

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

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

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