string - Remove filename from a URL/Path in java -

How do I remove a file name from a URL or string?

  string OS = System.getProperty ("os.name") toLowerCase () .; String Natal Dier = Game.clas.ptProcessingDemon (). GetCodeSource () GetLocation (). GetFile () ToString (); // string to & lt; Name & gt; Remove If (nativeDir.endsWith (".jar")) nativeDir = nativeDir.substring (0, nativeDir.lastIndexOf ("/")); // Load the correct files for the file: (new file (original file + .file separator + "Lib" + file. Separator + "original")). List files ()) {if (f.isDirectory () & amp; Amp; os.contains (f.getName (). ToLowerCase ()) {System.setProperty ("org.lwjgl.librarypath", f.getAbsolutePath ( )); break; }}   
 That is what I have, and it works. I know that because I use "/", it will only work for windows. I want to make it platform independent.   
 
 
  
 You can remove the base path, file name, extension, etc. with any flavor of the file separator:  
 < Code> string url = "c: \\ windows \\ system32 \\ cmd.exe"; String brace URL = filename utility path (url); String MyFile = Filename UT.getBaseName (url) + "." + File Name Availability Extension (url); Println (baseurl); Println (myFile);   
 returns  
  windows \ system32 \ cmd.exe   
 with URL;  string url = "C: /windows/system32/cmd.exe";   
 This must be done;  
  windows / system32 / cmd exe