java Java 中的 linkedblockingrequeremovelast()方法

Java 中的 linkedblockingrequeremovelast()方法

原文:https://www . geeksforgeeks . org/link edblockingeque-remove last-method-in-Java/

的 removeLast() 方法将链接锁定请求返回并移除德奎容器尾部的元素。如果德奎容器是空的，该方法抛出一个 NoSuchElementException 。

语法:

public E removeLast()

参数:该方法不接受任何参数。

返回:这个方法返回德格容器的尾部。

异常:如果德格为空，该函数抛出 NoSuchElementException 。

下面的程序说明了 removeLast() 链接锁定请求的方法:

程序 1:

// Java Program to demonstrate removeLast()
// method of LinkedBlockingDeque

import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws InterruptedException
    {

        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD
            = new LinkedBlockingDeque<Integer>();

        // Add numbers to end of LinkedBlockingDeque
        LBD.add(7855642);
        LBD.add(35658786);
        LBD.add(5278367);
        LBD.add(74381793);

        // print Dequeue
        System.out.println("Linked Blocking Deque: " + LBD);

        // removes the last element and prints it
        System.out.println("Linked Blocking Deque: " +      
                        LBD.removeLast());

        // prints the Deque
        System.out.println("Linked Blocking Deque: " + LBD);
    }
}

输出:

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

节目 2:

// Java Program to demonstrate removeLast()
// method of LinkedBlockingDeque

import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws NoSuchElementException
    {

        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD
            = new LinkedBlockingDeque<Integer>();

        // Add numbers to end of LinkedBlockingDeque
        LBD.add(7855642);
        LBD.add(35658786);
        LBD.add(5278367);
        LBD.add(74381793);

        // print Dequeue
        System.out.println("Linked Blocking Deque: " + LBD);

        // Deque is empty
        LBD.clear();

        // throws an exception
        LBD.removeLast();
    }
}

输出:

Exception in thread "main" java.util.NoSuchElementException
    at java.util.concurrent.LinkedBlockingDeque.removeLast(LinkedBlockingDeque.java:462)
    at GFG.main(GFG.java:29)