OpenJDK builds from AdoptJDK [1] have LTS versions. The also state the following in their Roadmap [2]:
In addition, every three years one feature release will be designated as the Long Term Supported (LTS) release. We will produce LTS releases for at least four years. This assurance will allow you to stay on a well-defined code stream, and give you time to migrate to the next, new, stable, LTS release when it becomes available.
In addition, every three years one feature release will be designated as the Long Term Supported (LTS) release. We will produce LTS releases for at least four years. This assurance will allow you to stay on a well-defined code stream, and give you time to migrate to the next, new, stable, LTS release when it becomes available.
[1] - https://adoptopenjdk.net
[2] - https://adoptopenjdk.net/support.html#roadmap