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

public class JarManifest {
   /**
    * main()
    */
   public static void main(String[] args) throws IOException {
      // Open the jar file, using the first command line argument as the file
      // name.

      JarFile jar = new JarFile(args[0]);

      // Process the jar file. Close it when the block is exited.

      try {
         // Get the manifest.
         
         Manifest manifest = jar.getManifest();
        
         // Loop through the manifest attributes. Print the key name and value
         // for each one.
         
         for (Iterator entries = manifest.getMainAttributes().entrySet().iterator();
              entries.hasNext(); ) {
            Map.Entry entry = (Map.Entry) entries.next();
            System.out.println(entry.getKey() + ": " + entry.getValue());
         }

         System.out.println("");
         
         // Loop through the manifest entries. Print the name and attributes of
         // each one.

         for (Iterator entries = manifest.getEntries().entrySet().iterator();
              entries.hasNext(); ) {
            Map.Entry entry = (Map.Entry) entries.next();
            System.out.println("Name: " + entry.getKey());

            for (Iterator attributes = ((Attributes) entry.getValue()).entrySet().iterator();
                 attributes.hasNext(); ) {
               Map.Entry attribute = (Map.Entry) attributes.next();
               System.out.println(attribute.getKey() + ": " + attribute.getValue());
            }

            System.out.println("");
         }
      }
      finally {
         jar.close();
      }
   }
}