Given an absolute path for a file (Unix-style), simplify it.
For example,
path = "/home/"
, => "/home"
path = "/a/./b/../../c/"
, => "/c"
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 String simplifyPath(String path) { String[] paths = path.split("\\/+"); Stack<String> stack = new Stack<>(); for(String p:paths) { if(p.isEmpty() || p.equals(".")) continue; if(p.equals("..")) { if(!stack.isEmpty()) stack.pop(); } else { stack.push(p); } } if(stack.isEmpty()) return "/"; String s = ""; while(!stack.isEmpty()) { s = "/"+stack.pop()+s; } return s; }