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

public class ZipExtract {
   /**
    * main()
    */
   public static void main(String[] args) throws IOException {
      // Get the zip name and the entry name.

      String zipName = args[0];
      String entryName = args[1];

      // Open the zip.

      ZipFile zip = new ZipFile(zipName);
      System.out.println(zipName + " opened.");

      try {
         // Get the entry and its input stream.

         ZipEntry entry = zip.getEntry(entryName);

         // If the entry is not null, extract it. Otherwise, print a 
         // message.

         if (entry != null) {
            // Get an input stream for the entry.
            
            InputStream entryStream = zip.getInputStream(entry);

            try {
               // Create the output file (clobbering the file if it exists).

               FileOutputStream file = new FileOutputStream(entry.getName());

               try {
                  // Allocate a buffer for reading the entry data.

                  byte[] buffer = new byte[1024];
                  int bytesRead;

                  // Read the entry data and write it to the output file.

                  while ((bytesRead = entryStream.read(buffer)) != -1) {
                     file.write(buffer, 0, bytesRead);
                  }

                  System.out.println(entry.getName() + " extracted.");
               }
               finally {
                  file.close();
               }
            }
            finally {
               entryStream.close();
            }
         }
         else {
            System.out.println(entryName + " not found.");
         } // end if
      }
      finally {
         zip.close();
         System.out.println(zipName + " closed.");
      }
   }
}