Java ArrayDeque removeLastOccurrence()方法

Java中的java.util.ArrayDeque.removeLastOccurrence( Object )方法用于从这个deque中删除最后出现的特定元素。如果该元素只出现了一次，那么该元素就会被移除，并返回true。如果没有这样的元素被移除，则会返回false。

语法

Array_Deque.removeLastOccurrence(Object O)

参数： 该方法需要一个ArrayDeque类型的参数O，指的是最后出现的元素要被删除。

返回值： 如果该元素存在于Deque中，该方法返回true，否则返回false。

下面的程序说明了Java.util.ArrayDeque.removeLastOccurrence（）方法。

程序1 :

// Java code to illustrate removeLastOccurrence()
import java.util.*;
  
public class ArrayDequeDemo {
    public static void main(String args[])
    {
        // Creating an empty ArrayDeque
        Deque<String> de_que = new ArrayDeque<String>();
  
        // Use add() method to add elements into the Deque
        de_que.add("Welcome");
        de_que.add("To");
        de_que.add("Geeks");
        de_que.add("For");
        de_que.add("Geeks");
  
        // Displaying the ArrayDeque
        System.out.println("Initial ArrayDeque: " + de_que);
  
        // Removing elements using removeLastOccurrence() method
        de_que.removeLastOccurrence("Geeks");
        de_que.removeLastOccurrence("For");
  
        // Displaying the ArrayDeque after removal
        System.out.println("ArrayDeque after removing "
                           + "elements: " + de_que);
    }
}

输出。

Initial ArrayDeque: [Welcome, To, Geeks, For, Geeks]
ArrayDeque after removing elements: [Welcome, To, Geeks]

程序2 :

// Java code to illustrate removeLastOccurrence()
import java.util.*;
  
public class ArrayDequeDemo {
    public static void main(String args[])
    {
        // Creating an empty ArrayDeque
        Deque<Integer> de_que = new ArrayDeque<Integer>();
  
        // Use add() method to add elements into the Deque
        de_que.add(10);
        de_que.add(15);
        de_que.add(30);
        de_que.add(20);
        de_que.add(5);
  
        // Displaying the ArrayDeque
        System.out.println("Initial ArrayDeque: " + de_que);
  
        // Removing elements using removeLastOccurrence() method
        de_que.removeLastOccurrence(30);
        de_que.removeLastOccurrence(5);
  
        // Displaying the ArrayDeque after removal
        System.out.println("ArrayDeque after removing "
                           + "elements: " + de_que);
    }
}

输出。

Initial ArrayDeque: [10, 15, 30, 20, 5]
ArrayDeque after removing elements: [10, 15, 20]