Java delete non-empty folders

The Java File.delete(); method only works on empty folders to delete a folder and its contents recursivly do some thing like:

   public static void recDelete(File folder) {
      if(folder.exists()) {
       if(folder.isDirectory()) {
        File[] files = folder.listFiles();
           for(int i=0; i < files.length; i++) {
              File curFile = files[i];
              // call to delete the current file/folder
              recDelete(curFile);
            }    
       }
       //If a folder Deleted all contents
       //If a File Jump straight here
       folder.delete();
      }
   }