import java.nio.file.Path;
import java.nio.file.Paths;

public class PathDemo
{
   public static void main(String[] args)
   {
      Path inputPath = Paths.get("input.txt");
      System.out.println("Relative path: " + inputPath);
      Path absolutePath = inputPath.toAbsolutePath();
      System.out.println("Absolute path: " + absolutePath);
      Path parent = absolutePath.getParent();
      System.out.println("Its parent: " + parent);
      Path sibling = parent.resolve("output.txt");
      System.out.println("A sibling: " + sibling);
      Path fileName = sibling.getFileName();
      System.out.println("The sibling's file name: " + fileName);
      System.out.print("The sibling's path components: ");
      
      for (Path p : sibling)
      {
         System.out.print(p + " ");
      }
      System.out.println();
      
      Path changedExtension = sibling.getParent().resolve(
         sibling.getFileName().toString().replace(".txt", ".bak"));
      System.out.println("Changing the extension: " + changedExtension);
   }
}