All samples i find incorporate a number of other tools.

What i am looking for are steps to set up a simple RESTful service using java and command line.

Have you come across one?

Using Java Spring:

https://spring.io/guides/gs/rest-service/

Otherwise you'd go crazy.

Thanks.  Will check it out.

I used this site (https://www.codejava.net/java-ee/web-services/create-client-server-application-for-web-service-in-java) for a general web service.
Seeing all the steps required really helped get an understanding of what is going on especially the wsimport section.

My concern with using some tool is some of the behind the scenes stuff gets lost and as a result so does some understanding.

Spring Boot is what we're using for our microservices. It's an incredibly robust framework. Here is a simple example.

I think you need to separate a tool from a framework in your mindset. When I think of a tool, I think of something like MS Frontpage creating this awesome webpage with a metric ton of shit behind the scenes to pull it off. There's little way a person is going to look at it outside the tool and be able to make heads or tails of it. A framework, on the other hand, does all of the heavy lifting for you so you don't have to do much if anything to implement it. The code is available to you. The functionality is just abstracted.

For example, we provide our own template app that other teams can use. Right out of the box they get security (JWT, TLS, etc), configuration management, distributed tracing, metrics, health endpoints, and a myriad of other functionality. All they have to do is add their business logic.

I actually have a nice "Hello World" sample working but then move on to trying to send a Java object and that is a pain.
I have followed a few different samples and each one generates an error.
It is likely these samples are leaving out a small but important detail about the configuration.

Amazing that Java is still a thing....

Why? It works very well.

I'm not opposed to new things, though. My goal (if I can find some time) is to try to convert one or two of our Java microservices to Go. The trick is finding libraries to provide the same functionality. It's so easy with Spring Boot I dread having to pull it all together myself.

What do you make of Kotlin?

Does it really have to be java? With python+flask the whole project takes 7 lines, including the import statements.

If you're learning to support an existing project or trying to qualify for a specific job, carry on. But if you're looking to start a new project or just learn a new skill, I'd stay away from java.

Its for an existing project.
Haven't had time to get back to it, but still looking for an example passing a Java object.

No. I've glanced at it and it has some impressive features, though. One of my developers is a fan.
You're trying to pass an object how? To what? What's your goal?

Goal is to take the next step from a simple Hello World RESTful Service to one that accepts a Java Object.

How? Well, at this point I am open. Some use XML and other JSON to pass the object and these contribute to which annotations are used with the RESTful Service.
My objective at this point is to get the object over. From there I will expand to the specifics.
I have tried a few examples of various means and each one fails.
Usually these sample leave out a minor yet important detail that I suspect is a well known step with RESTful Services but only well known if you have done it before.

So, it sounds like your project is to introduce a deserialization vulnerability

So what fails? It should be fairly straightforward to receive a JSON payload which Jackson can easily consume. It's great for serializing/deserializing.

Tutorial

yea.... dont roll your own, stick with existing frameworks unless you really understand what you are doing.
if you can get away with doing it yourself (if its really that simple and robust what you build) then great, otherwise youll need to update your stuff as security bugs are fixed in those frameworks.

The Jackson tutorial is neat although it adds another layer I need to learn but it seems straightforward.

I think a major issue with my sample is the RESTful service is not set up properly to accept the object.
There are certain annotations used based on how the object is being passed.

This is why I am looking for a complete example to ensure especially the server is set up correctly.

Maybe it would help if you could post the sample you followed.