Java中的Java.util.Stack.pop()方法用于从堆栈中弹出元素。该元素从堆栈顶部弹出,并从堆栈顶部移除。
用法:
STACK.pop()
参数:该方法不带任何参数。
返回值:此方法返回出现在堆栈顶部的元素,然后将其删除。
异常:如果堆栈为空,则抛出方法EmptyStackException。
以下示例程序旨在说明Java.util.Stack.pop()方法:
示例1:
// Java code to illustrate pop()
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<String> STACK = new Stack<String>();
// Use add() method to add elements
STACK.push("Welcome");
STACK.push("To");
STACK.push("Geeks");
STACK.push("For");
STACK.push("Geeks");
// Displaying the Stack
System.out.println("Initial Stack: " + STACK);
// Removing elements using pop() method
System.out.println("Popped element: " +
STACK.pop());
System.out.println("Popped element: " +
STACK.pop());
// Displaying the Stack after pop operation
System.out.println("Stack after pop peration "
+ STACK);
}
}
输出:
Initial Stack: [Welcome, To, Geeks, For, Geeks] Popped element: Geeks Popped element: For Stack after pop peration [Welcome, To, Geeks]
示例2:
// Java code to illustrate pop()
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<Integer> STACK = new Stack<Integer>();
// Use add() method to add elements
STACK.push(10);
STACK.push(15);
STACK.push(30);
STACK.push(20);
STACK.push(5);
// Displaying the Stack
System.out.println("Initial Stack: " + STACK);
// Removing elements using pop() method
System.out.println("Popped element: " +
STACK.pop());
System.out.println("Popped element: " +
STACK.pop());
// Displaying the Stack after pop operation
System.out.println("Stack after pop operation "
+ STACK);
}
}
输出:
Initial Stack: [10, 15, 30, 20, 5] Popped element: 5 Popped element: 20 Stack after pop operation [10, 15, 30]
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注:本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 Stack pop() Method in Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。