public URLJarFile(File file) throws IOException 
{
        this(file, null);
}

 public URLJarFile(File file,
    URLJarFile.URLJarFileCloseController closeController) throws IOException 
{
        super(file, true, ZipFile.OPEN_READ | ZipFile.OPEN_DELETE);
        this.closeController = closeController;
}

 public  void close() throws IOException 
{
        if (closeController != null) {
                closeController.close(this);
        }
        super.close();
}

 protected  void finalize() throws IOException 
{
        close();
}

 public ZipEntry getEntry(String name) 
{
        ZipEntry ze = super.getEntry(name);
        if (ze != null) {
            if (ze instanceof JarEntry)
                return new URLJarFileEntry((JarEntry)ze);
            else
                throw new InternalError(super.getClass() +
                                        " returned unexpected entry type " +
                                        ze.getClass());
        }
        return null;
}

Returns the ZipEntry for the given entry name or null if not found.

 static JarFile getJarFile(URL url) throws IOException 
{
          
        return getJarFile(url, null);
}

 static JarFile getJarFile(URL url,
    URLJarFile.URLJarFileCloseController closeController) throws IOException 
{
        if (isFileURL(url))
            return new URLJarFile(url, closeController);
        else {
            return retrieve(url, closeController);
        }
}

 public Manifest getManifest() throws IOException 
{
        if (!isSuperMan()) {
            return null;
        }
        Manifest man = new Manifest();
        Attributes attr = man.getMainAttributes();
        attr.putAll((Map)superAttr.clone());
        // now deep copy the manifest entries
        if (superEntries != null) {
            Map< String, Attributes > entries = man.getEntries();
            for (String key : superEntries.keySet()) {
                Attributes at = superEntries.get(key);
                entries.put(key, (Attributes) at.clone());
            }
        }
        return man;
}

 public static  void setCallBack(URLJarFileCallBack cb) 
{
        callback = cb;
}