Poor man's version of FindClasses

We already spoke here on how to find a class in an ocean of JAR files.

Here is a brutally simple utility to write all the JAR contents to a file:

import java.io.BufferedWriter;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class FindClasses {
 static boolean DEBUG = true;
 static String rootFolder = "C:\\Apps\\Pippo\\";
 static List<File> jarFiles = new ArrayList<File>();
 public static void main(String[] args) throws Throwable {
  Path outputFilePath = Paths.get("allfilesPippo.out");
  BufferedWriter writer = Files.newBufferedWriter(outputFilePath);
  File rootFolderDir = new File(rootFolder);
  scan(rootFolderDir);
  System.out.println("END SCAN");
  if (DEBUG) {
   for (File jar : jarFiles) {
    System.out.println(jar.getAbsolutePath());
   }
  }

  for (File jar : jarFiles) {
   writer.write("BEGIN JAR: " + jar.getAbsolutePath() + "\n");
   ZipFile zipFile = new ZipFile(jar);
   Enumeration<? extends ZipEntry> entries = zipFile.entries();
   while (entries.hasMoreElements()) {
    ZipEntry entry = entries.nextElement();
    writer.write(entry.getName() + "\n");
   }

   zipFile.close();
   writer.write("END JAR: " + jar.getAbsolutePath() + "\n\n");
  }
  writer.close();
 }
 private static void scan(File folderToScan) {
  if (DEBUG)
   System.out.println("scanning " + folderToScan.getAbsolutePath());
  for (File file : folderToScan.listFiles()) {
   if (file.isDirectory()) {
    scan(file);
   } else {
    if (file.getName().toLowerCase().endsWith(".jar")) {
     jarFiles.add(file);
    }
   }
  }
 }
}