Spring Download 1.2.3.RELEASE ApplicationReadyEvent not found

Question

I read Spring Download Link (version 1.2.3-RELEASE) and in clause 22.4. Application events and listener states at point 4:

"ApplicationReadyEvent is dispatched after the update, and any associated callbacks have been processed to indicate that the application is ready to serve requests."

So I tried:

SpringApplication app = new SpringApplication(LearnSpringBootApplication.class); app.addListeners(new ApplicationListener<ApplicationReadyEvent>() { 

...

but it cannot find ApplicationReadyEvent. Is it deleted? If so, is there an equivalent for it?

I found this post here:

Spring Download - Wait for the web server to start

but it was interesting, is there any other way?