Java ArrayDeque remove()用法及代码示例

Java.util.ArrayDeque.remove()方法用于删除Deque头部的元素。

用法:

Array_Deque.remove()

参数：该方法不带任何参数。

返回值：此方法返回存在于双端队列头部的元素。

异常：如果双端队列为空，则抛出NoSuchElementException异常。

下面的程序演示了Java.util.ArrayDeque.remove()方法：

示例1:

// Java code to illustrate remove() 
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 remove() method 
        de_que.remove(); 
        de_que.remove(); 
  
        // 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: [Geeks, For, Geeks]

示例2:

// Java code to illustrate remove() 
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 remove() method 
        de_que.remove(); 
        de_que.remove(); 
  
        // 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: [30, 20, 5]

Java.util.ArrayDeque.remove(Object)方法用于从ArrayDeque中删除特定元素。

用法:

Priority_Queue.remove(Object O)

参数：参数O跟ArrayDeque的元素类型一致，并指定要从ArrayDeque中删除的元素。

返回值：如果指定的元素存在于双端队列中，则此方法返回True，否则返回False。

下面的程序演示了Java.util.ArrayDeque.remove()方法：

示例1:

// Java code to illustrate remove() 
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 remove() method 
        de_que.remove("Geeks"); 
        de_que.remove("For"); 
        de_que.remove("Welcome"); 
  
        // 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: [To, Geeks]

示例2:

// Java code to illustrate remove() 
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 remove() method 
        de_que.remove(30); 
        de_que.remove(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]

相关用法

注：本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 ArrayDeque remove() Method in Java。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。