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From: Jan Burse <janburse@fastmail.fm>
Newsgroups: comp.lang.java.programmer
Subject: With new Path (Re: A "current directory" concept for Java...)
Date: Sat, 23 Aug 2014 10:48:55 +0200
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Jan Burse schrieb:
>
> The getCanonicalPath() method will usually resolve
> ../ and ./ parts in the str together with curdir.

Things are a little confusing under the hood of
java.io.File. Since they use a method named resolve
which does not resolve ../ and ./.

The same confusion is under the hood of java.nio.file.Path,
the method named resolve does also not resolve ../ and
./. Here you have to use the method normalize.

So the solution with path would be:

public class State {
     private static String curdir;

     public void chDir(String str) {
         curdir = Paths.getPath(curdir).resolve(str).normalize();
     }

}