public java.security.cert.Certificate[] getCertificates()
         throws IOException
    {
        JarEntry e = getJarEntry();
        return e != null ? e.getCertificates() : null;
    }
public java . security . cert . Certificate [ ] getCertificates ( ) throws IOException { JarEntry e = getJarEntry ( ) ; return e != null ? e . getCertificates ( ) : null ; }
Return the Certificate object for this connection if the URL
for it points to a JAR file entry, null otherwise. This method
can only be called once
the connection has been completely verified by reading
from the input stream until the end of the stream has been
reached. Otherwise, this method will return {@code null}

@return the Certificate object for this connection if the URL
for it points to a JAR file entry, null otherwise.

@exception IOException if getting the JAR entry causes an
IOException to be thrown.

@see #getJarEntry