Java Deque removeLast() 方法

2025 年 3 月 22 日 | 阅读需 2 分钟

Java Deque 接口的 removeLast() 方法用于检索并移除给定双端队列的最后一个元素。该方法与 pollLast() 方法的区别在于，如果给定的双端队列为空，它会抛出异常。

语法

参数

不适用

上述方法用于返回给定双端队列的尾部元素。

Throw

NoSuchElementException - 如果给定的双端队列为空。

示例 1

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequeremoveLastExample1 {
    public static void main(String[] args) {
    Deque<String> deque = new ArrayDeque<>();
       deque.offer("Welcome");
       deque.offer("to");
       deque.offer("my");
       deque.offer("World");
     String val = deque.removeLast();
   System.out.println("The value that needs to be removed is : "+val);
    System.out.println("The final deque is : ");
    for (String string : deque) {
		System.out.println(string);
	    }  	
    }
} 

输出

The value that needs to be removed is : World
The final deque is : 
Welcome
to
my

示例 2

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequeremoveLastExample2 {
    public static void main(String[] args) {
    Deque<Character> deque = new ArrayDeque<>();
       deque.offer('W');
       deque.offer('E');
       deque.offer('B');
       deque.offer('S');
       deque.offer('I');
       deque.offer('T');
       deque.offer('E');
     Character val = deque.removeLast();
   System.out.println("The value that needs to be removed is : "+val);
    System.out.println("The final deque is : ");
    for (Character character : deque) {
		System.out.println(character);
	} 	
    }
}

输出

The value that needs to be removed is : E
The final deque is : 
W
E
B
S
I
T

示例 3

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequeremoveLastExample3 {
    public static void main(String[] args) {
    Deque<Float> deque = new ArrayDeque<>();
       deque.offer(55.9F);
       deque.offer(22.5f);
       deque.offer(77f);
       deque.offer(98.7f);
   Float  val = deque.removeLast();
   System.out.println("The value that needs to be removed is : "+val);
    System.out.println("The final deque is : ");
    for (Float float1 : deque) {
	System.out.println(float1);	
	} 	
  }
}

输出

The value that needs to be removed is : 98.7
The final deque is : 
55.9
22.5
77.0

下一主题Java Deque

Java Deque removeLast() 方法

语法

参数

返回

Throw

示例 1

示例 2

示例 3

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Java Deque removeLast() 方法

语法

参数

返回

Throw

示例 1

示例 2

示例 3

相关帖子

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