stack.pop()方法_Java Stack pop（）方法与示例

stack.pop()方法

堆栈类pop()方法 (Stack Class pop() method)

• pop() method is available in java.util package.

  pop()方法在java.util包中可用。

• pop() method is used to return the top element from this Stack and it retrieves element with removing.

  pop()方法用于从此Stack中返回顶部元素，并通过删除来检索元素。

• pop() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  pop()方法是一种非静态方法，只能由类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• pop() method does not throw an exception at the time of returning top element.

  在返回top元素时， pop()方法不会引发异常。

Syntax:

句法：

    public Object pop();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is Object, it returns head element from the stack.

该方法的返回类型为Object ，它从堆栈中返回head元素。

Example:

例：

// Java program to demonstrate the example 
// of Object pop() method 
// of Stack

import java.util.*;

public class PopOfStack {
 public static void main(String args[]) {

  // Instantiates Stack object
  Stack s = new Stack();

  // By using push() method isto
  // push the given onto the stack
  s.push(10);
  s.push(20);
  s.push(30);
  s.push(40);
  s.push(50);

  // Display Stack
  System.out.println("s:" + s);

  // By using pop() method is
  // to pop the top element
  // with removing from the stack
  Object ele = s.pop();

  // Display Popped Element
  System.out.println("s.pop(): " + ele);

  // Display Updated Stack
  System.out.println("s:" + s);

 }
}

Output

输出量

s:[10, 20, 30, 40, 50]
s.pop(): 50
s:[10, 20, 30, 40]

翻译自: https://www.includehelp.com/java/stack-pop-method-with-example.aspx

stack.pop()方法