Java 中的 PriorityBlockingQueue remove()方法
原文:https://www . geeksforgeeks . org/priorityblockingqueue-remove-method-in-Java/
优先级阻塞队列 的移除(对象 o) 方法用于从该队列中删除元素。此方法移除作为参数传递的元素的单个实例(如果存在的话)。 当且仅当元素被移除时返回真，否则返回假。
语法:
public boolean remove(Object o)
参数:该方法接受一个强制参数 o ，该参数是要从该队列中删除的元素(如果存在)。
返回值:如果成功移除指定元素，则该方法返回真。否则此方法返回假。
下面的程序说明了 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);
}
}
Output:
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);
}
}
Output:
Queue: [A Computer, Portal, Geeks, forGeeks]
Geeks removed: true
Queue: [A Computer, Portal, forGeeks]
SandeepJain removed: false
Queue: [A Computer, Portal, forGeeks]
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