A naive implementation of du -s in Java using NIO.2

du.java

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.*;

public class Du {
    public static final String PREFIX =
            "gluster://172.31.31.31:foo/usr";
    
    public static long total = 0;

    public static void main(String[] args) throws URISyntaxException, IOException {
        Path path = Paths.get(new URI(PREFIX));
        long startTime = System.nanoTime();
        scanDir(path);
        long endTime = System.nanoTime();
        double time = (endTime - startTime) / 1000000.0;
        System.out.println("TOTAL: " + total + " RUNTIME: " + time);
    }

    private static void scanDir(Path path) throws IOException {
        total += Files.size(path);
        DirectoryStream<Path> directoryStream = Files.newDirectoryStream(path);
        for (Path p : directoryStream) {
            if (p.endsWith("/.") || p.endsWith("/..") || Files.isSymbolicLink(p)) {
                continue;
            }
            if (Files.isDirectory(p, LinkOption.NOFOLLOW_LINKS)) {
                scanDir(p);
            } else {
                try {
                    long size = Files.size(p);
                    total += size;
                } catch (Exception e) {
                    System.out.println("EXCEPTION: "+p);
                    e.printStackTrace();
                }
            }
        }
    }
}