All language subtitles for 028 Java Config Bean - Coding - Part 1_en

Instructor: Alrighty. So diving into our IDE,

we'll take care of our normal housekeeping work.

And then I'll do a copy paste here on this directory.

08-bean-lifecycle-methods.

And I'll rename it as

09-Java-config-bean.

And then I'll open this project here in IntelliJ.

I'll just do a rebuild on the project

and I wanna remove the code

for @PostConstruct and @PreDestroy

cause we don't really need it for these examples here.

So I'll just kind of clean it up a bit.

I'll just move down here into my cricket coach.

Expand my window here for a second,

and then I'll remove the code here

for @PostConstruct and @PreDestroy.

And now what I'll do is I'll create

this new class call SwimCoach.

I'll expand my window here for a second.

This SwimCoach will implement the coach interface.

And then our coach here says,

swim a thousand meters as a warmup.

Oh my.

And then we'll also create a constructor here

just for diagnostics,

just to see that that this given class is being created.

So I just assist our print line and constructor

and I simply print out the class name.

And then notice here

I'm not using a component annotation here on purpose.

Now let's go ahead and move into our demo controller

and I'll inject our SwimCoach

and I'll just clean the code up just a bit there.

And let's go ahead and run our application.

And it's expected this will kind of crash and fail, right?

It says it failed to start.

The parameter of zero of the constructor

could not be found

and the injection point

with the following annotation qualifier SwimCoach.

Okay? So it couldn't find a swim coach,

and that's expected because we really

haven't done any special annotations

on that SwimCoach class.

We can't find a swim coach

because it's not annotated with component.

For this example, we can use an alternate solution.