Heroku cannot deploy Java 11 Spring Boot App [duplicate]

Answer 1

I have successfully deployed my application on heroku by adding system.properties file in the project root folder.

system.properties

java.runtime.version=11

pom.xml

2.1.7.RELEASE

    11

`

   org.postgresql
   postgresql
   9.4-1206-jdbc42

Reference https://devcenter.heroku.com/articles/java-support#specifying-a-java-version