Java ArrayDeque remove()方法

1. Java.util.ArrayDeque.remove()**方法用于删除存在于Deque头部的元素。

语法:

Array_Deque.remove()

参数：该方法不接受任何参数。

返回值：该方法返回Deque头部的元素。

异常：如果deque是空的，该方法会抛出NoSuchElementException。

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

程序 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]

程序 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]

2. Java.util.ArrayDeque.remove( Object )方法用于从ArrayDeque中删除一个特定元素。

语法:

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：如果指定的元素存在于Deque中，该方法返回True，否则返回False。

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

程序 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]

程序 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]