ReadFile.java

import java.util.*;
import java.net.URI;
import java.nio.file.Path;
import java.nio.file.*;
import static java.lang.System.out;
import java.util.stream.*;

public class ReadFile {

 public static void main(String[] args) throws Throwable {
 Map<String, String> env = new HashMap<>();
 env.put("create", "true");

 String zip_path = args[0];
 String rand_files_dir_name = args[1];

 URI uri = URI.create("jar:file:" + zip_path);

 ArrayList<Integer> runtimes = new ArrayList<Integer>();

 try (FileSystem zipfs = FileSystems.newFileSystem(uri, env)) {
 Stream<Path> file_stream = Files.list(zipfs.getPath(rand_files_dir_name));
 int file_count = file_stream.collect(Collectors.toList()).size();
 out.println("Files: " + Integer.toString(file_count));

 for(int i = 1; i <= file_count; i++) {
 long startTime = System.nanoTime();
 Path pathInZip = zipfs.getPath(rand_files_dir_name + "/" + Integer.toString(i) + "_rand.txt");

 byte[] allBytes = Files.readAllBytes(pathInZip);
 long endTime = System.nanoTime();

 int runtime = (int)(endTime - startTime)/1000000;
 runtimes.add(runtime);

 out.println(Integer.toString(i) + " -- " + Integer.toString(runtime) + "ms");
 }
 }

 double runtimeSum = 0;
 for(int i = 0; i < runtimes.size(); i++) {
 runtimeSum += runtimes.get(i);
 }

 out.print("Avg: " + Double.toString(runtimeSum / runtimes.size()));
 }

}