Java中的ArrayDeque remove()方法

1. Java.util.ArrayDeque.remove()方法用于移除出现在 Deque 头部的元素。

   句法：

   Array_Deque.remove()

   参数：该方法不带任何参数。

   返回值：此方法返回出现在双端队列头部的元素。

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

   下面的程序说明了Java.util.ArrayDeque.remove() 方法：

   方案一：

   // Java code to illustrate remove()
   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 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]
   

   方案二：

   // Java code to illustrate remove()
   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 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]
   

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

   句法：

   Priority_Queue.remove(Object O)

   参数：参数O是ArrayDeque的类型，指定要从ArrayDeque中移除的元素。

   返回值：如果指定元素存在于 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.remove() 方法：

   方案一：

   // Java code to illustrate remove()
   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 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]
   

   方案二：

   // Java code to illustrate remove()
   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 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]