Java Deque pop() 方法

2025 年 3 月 22 日 | 阅读需 2 分钟

Java Deque 接口的 pop() 方法用于从给定的由该 deque 表示的堆栈中弹出元素。我们也可以说，上述方法删除并返回 deque 的第一个元素。上述方法与 removeFirst() 方法相似。

语法

参数

不适用

上述方法用于返回给定 deque 前面的元素。

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 JavaDequepopExample1 {
    public static void main(String[] args) {
		Deque<String> deque = new ArrayDeque<>();
	    deque.offer("Apple");
	    deque.offer("Guava");
	    deque.offer("Mango");
	    deque.offer("Pear");
	   String val =  deque.pop();
	  System.out.println("The first fruit which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (String string : deque) {
		System.out.println(string);
	  }
   }
}

输出

The first fruit which has been removed is : Apple
The final deque is given as : 
Guava
Mango
Pear

示例 2

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepopExample2 {
    public static void main(String[] args) {
		Deque<Float> deque = new ArrayDeque<>();
	    deque.offer(67f);
	    deque.offer(55f);
	    deque.offer(78f);
	    deque.offer(77f);
	   Float val =  deque.pop();
	  System.out.println("The first number which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (Float float1 : deque) {
		System.out.println(float1);
	}
   }
}

输出

The first number which has been removed is : 67.0
The final deque is given as : 
55.0
78.0
77.0

示例 3

import java.util.ArrayDeque;
import java.util.Deque;
public class JavaDequepopExample3 {
    public static void main(String[] args) {
		Deque<Character> deque = new ArrayDeque<>();
	    deque.offer('a');
	    deque.offer('b');
	    deque.offer('c');
	    deque.offer('d');
	   Character val =  deque.pop();
	  System.out.println("The first character which has been removed is : "+val);   
	  System.out.println("The final deque is given as : ");   
	  for (Character character : deque) {
		System.out.println(character);
	}
   }
}

输出

The first character which has been removed is : a
The final deque is given as : 
b
c
d

下一主题Java Deque

Java Deque pop() 方法

语法

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Throw

示例 1

示例 2

示例 3

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Java Deque pop() 方法

语法

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示例 1

示例 2

示例 3

相关帖子

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