JEP 244 has enhanced the Java Secure Socket Extension (JSSE) to provide support for the TLS Application-Layer Protocol Negotiation (ALPN) Extension (RFC 7301). New methods have been added to the `javax.net.ssl` classes `SSLEngine`, `SSLSocket`, and `SSLParameters` to allow clients and servers to negotiate an application layer value as part of the TLS handshake.
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