import java.util.*;
import java.util.zip.*;
import java.util.jar.*;
import java.io.*;


public class JarLister {

  public static void main(String[] args) {

    for (int i = 0; i < args.length; i++) {
      try {
        JarFile jf = new JarFile(args[i]);
               
        Enumeration e = jf.entries();
        while (e.hasMoreElements()) {
          JarEntry je = (JarEntry) e.nextElement();
          String name = je.getName();
          Date lastModified = new Date(je.getTime());
          long uncompressedSize = je.getSize();
          long compressedSize = je.getCompressedSize();
          long crc = je.getCrc();
          int method = je.getMethod();
          String comment = je.getComment();
          
          if (method == ZipEntry.STORED) {
            System.out.println(name + " was stored at " + lastModified);          
            System.out.println("with a size of  " + uncompressedSize 
             + " bytes"); 
          }
          else if (method == ZipEntry.DEFLATED) {
            System.out.println(name + " was deflated at " + lastModified);
            System.out.println("from  " + uncompressedSize + " bytes to " 
             + compressedSize + " bytes, a savings of " 
             + 100.0*compressedSize/uncompressedSize + "%");         
          }
          else {
            System.out.println(name 
             + " was compressed using an unrecognized method at " 
             + lastModified);
            System.out.println("from  " + uncompressedSize + " bytes to " 
             + compressedSize + " bytes, a savings of " 
             + compressedSize/uncompressedSize*100.0 + "%");         
          }
          System.out.println("Its CRC is " + crc);
          if (comment != null && !comment.equals("")) {
            System.out.println(comment);
          }
          if (je.isDirectory()) {
            System.out.println(name + " is a directory");
          }
          Attributes a = je.getAttributes();
          if (a != null) {
            Object[] nameValuePairs = a.entrySet().toArray();
            for (int j = 0; j < nameValuePairs.length; j++) {
              System.out.println(nameValuePairs[j]);
            }
          }
          
          System.out.println();
        }
      }
      catch (IOException e) {
        System.err.println(e);
        e.printStackTrace();
      }       
    }

  }

}