Auto Update with devtools

 This actually meant to be used when change in .class file. This functionality is not enabled in intellij, this is meant for actually to work with sprint sts tool. 

But it can be stimulate with update class and resources in deactivation in project properties.

or,

https://www.youtube.com/watch?v=Dpk-RUsZBug&ab_channel=CodeJava

or,

file,setting, "build, execution, deployment", compiler,  click on build project automatically.

and double click shift. GO TO     registery, and click on 

compiler.automake.allow.when.app.running