The Java Secure Socket Extension (JSSE) provides a Java version of the TLS and DTLS protocols. More specifically, it provides implementations of SSL v.3.0, TLS versions 1.0, 1.1, 1.2, and 1.3 as well as DTLS versions 1.0 and 1.2.. The JSSE also includes functionality for data encryption, server authentication, message integrity, and optional client authentication. For complete information, refer to Java Secure Socket Extension (JSSE) Reference Guide on the Oracle web site.

To generate certificates and private keys for the SSL/TLS handshake, you can use the Java command-line utility, keytool. Alternatively, there are third-party GUI tools available on the internet to help you.