两个栈实现队列

Posted 2022-12-16 唐 昊

package leetcode.lianbioa.project;

import java.util.ArrayList;
import java.util.List;
import java.util.Stack;

public class Day3 
    public static Stack<Integer> stack1 = new Stack<>();
    public static Stack<Integer> stack2 = new Stack<>();


    public static void main(String[] args) 
        push(123);
        push(1223);
        push(1224);
        System.out.println(pop());
        System.out.println(pop());
        System.out.println(pop());

    

    public static void push(int val) 
        stack1.push(val);
        while (!stack1.isEmpty()) 
            stack2.push(stack1.pop());
        

    

    public static int pop() 
        return stack2.pop();