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".

public class Solution {
    public String simplifyPath(String path) {
        StringBuilder ans = new StringBuilder();
        LinkedList<String> s = new LinkedList<String>();
        String[] tmp = path.split("/");
        
        for(String str : tmp){
            if("".equals(str) || ".".equals(str)) continue;
            else if("..".equals(str)){
                if(!s.isEmpty()) s.pop();
            }else
                s.push(str);
        }
        if(s.isEmpty()) return "/";
        while(!s.isEmpty()) ans.append("/"+s.removeLast());
        return ans.toString();
    }
}

该题按照提示，将各种情况考虑一下，比较轻松AC。