code: public static boolean replaceEntry(File zip, ZipEntrySource entry, File destZip) {
      return replaceEntries(zip, new ZipEntrySource[] { entry }, destZip);
    }
docs: Copies an existing ZIP file and replaces a given entry in it.
  
  @param zip
  an existing ZIP file (only read).
  @param entry
  new ZIP entry.
  @param destZip
  new ZIP file created.
  @return <code>true</code> if the entry was replaced.