Leetcode-simplify Path

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.

Solution:

1  Public classSolution {2      Publicstring Simplifypath (string path) {3         if(Path.isempty ())return"";4 5StringBuilder Builder =NewStringBuilder ();6Builder.append ('/');7         intindex = 1;8          while(index<path.length ()) {9             //get the Next Directory command.Ten             intNext =index; One              while(Next<path.length () && Path.charat (next)! = '/') next++; AString dir =path.substring (index,next); -             if(Dir.equals (".") | |Dir.isempty ()) { -index = next+1; the                 Continue; -}Else if(Dir.equals (".."))){ - Pathback (builder); -}Else { + Builder.append (dir); -Builder.append ('/'); +             } Aindex = next+1; at         } -  -         if(Builder.length () >1 && Builder.charat (Builder.length ()-1) = = '/') -Builder.deletecharat (Builder.length ()-1); -         returnbuilder.tostring (); -     } in  -      Public voidpathback (StringBuilder builder) { toBuilder.deletecharat (Builder.length ()-1); +          while(Builder.length () >0 && Builder.charat (Builder.length ()-1)! = '/') -Builder.deletecharat (Builder.length ()-1); the         if(Builder.length () ==0) builder.append ('/'); *     } $}

Leetcode-simplify Path