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.

This API change is required by [JSR 337 MR 3][https://jcp.org/aboutJava/communityprocess/mrel/jsr337/index3.html].