If I'm a developer whose primary expertise is in Node with a smattering of Laravel and Rails, what should I be expecting if I decide to write an api with Spring

If I'm a developer whose primary expertise is in Node with a smattering of Laravel and Rails, what should I be expecting if I decide to write an api with Spring Boot and Java? I've been curious for a while (Java performs very well on most benchmarks, and it looks great on a resume), and I've identified Spring Boot and Vertx as the two main web frameworks in Javaland.