📜  Java中的 ArrayDeque removeLastOccurrence() 方法

📅  最后修改于: 2022-05-13 01:55:15.500000             🧑  作者: Mango

Java中的 ArrayDeque removeLastOccurrence() 方法

Java中的Java .util.ArrayDeque.removeLastOccurrence( Object ) 方法用于从该双端队列中删除特定元素的最后一次出现。如果元素只存在一次,则删除该元素并返回 true。如果没有删除这样的元素,则返回 false。

句法:

Array_Deque.removeLastOccurrence(Object O)

参数:该方法采用一个 ArrayDeque 类型的参数O ,它指的是要删除最后一次出现的元素。

返回值:如果元素存在于 Deque 中,则此方法返回 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 de_que = new ArrayDeque();
  
        // 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]

方案二:

// Java code to illustrate removeLastOccurrence()
import java.util.*;
  
public class ArrayDequeDemo {
    public static void main(String args[])
    {
        // Creating an empty ArrayDeque
        Deque de_que = new ArrayDeque();
  
        // 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]