RFR: 6588: Move JMC core to JDK 8

[Jie Kang]

On Mon, 11 Jan 2021 12:37:10 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

> Compromise that might be enough to make JMC 8 more enjoyable for people streaming. The grand end goal will be to get rid of StreamModel, but there is no time left for JMC 8. Might want to mark the toolkits as deprecated, and kill them off in a later release.

@thegreystone Hi Marcus! The changes I've seen so far are to make use of JDK 8 language features where the overall functionality/result is the same. Are there any parts of the code where functionality is changed that might need a closer look?

-------------

PR: https://git.openjdk.java.net/jmc/pull/194