https://leetcode.com/problems/simplify-path/

https://leetcode.com/mockinterview/session/result/xjl3d3m/

现在字符串比较，都知道用 equals了，哈哈。不能用==,否则可能有bug。

 

package com.company;import java.util.*;class Solution {    public String simplifyPath(String path) {        Stack
     
       stk= new Stack<>();        String[] strs = path.split("/");        for (int i=0; i
      
        newStk= new Stack<>();        String tmp;        while (!stk.empty()) {            tmp = stk.pop();            newStk.push(tmp);        }        StringBuilder sb = new StringBuilder();        while (!newStk.empty()) {            sb.append("/" + newStk.pop());        }        String str = sb.toString();        if (str.equals("")) {            str = "/";        }        return str;    }}public class Main {    public static void main(String[] args) throws InterruptedException {        System.out.println("Hello!");        Solution solution = new Solution();        // Your Codec object will be instantiated and called as such:        String path = "/a/./b/../../c/";        String ret = solution.simplifyPath(path);        System.out.printf("ret:%s\n", ret);        System.out.println();    }}