71. Simplify Path java solutions

Given an absolute path for a file (Unix-style), simplify it.

For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c"

click to show corner cases.

Corner Cases:

 

  • Did you consider the case where path = "/../"?
    In this case, you should return "/".
  • Another corner case is the path might contain multiple slashes '/' together, such as "/home//foo/".
    In this case, you should ignore redundant slashes and return "/home/foo".
 1 public class Solution {
 2     public String simplifyPath(String path) {
 3         StringBuilder ans = new StringBuilder();
 4         LinkedList<String> s = new LinkedList<String>();
 5         String[] tmp = path.split("/");
 6         
 7         for(String str : tmp){
 8             if("".equals(str) || ".".equals(str)) continue;
 9             else if("..".equals(str)){
10                 if(!s.isEmpty()) s.pop();
11             }else
12                 s.push(str);
13         }
14         if(s.isEmpty()) return "/";
15         while(!s.isEmpty()) ans.append("/"+s.removeLast());
16         return ans.toString();
17     }
18 }

该题按照提示，将各种情况考虑一下，比较轻松AC。
posted @ 2016-06-29 14:13  Miller1991  阅读(139)  评论(0)    收藏  举报