Heroku cannot deploy Java 11 Spring Boot App [duplicate]

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

system.properties

java.runtime.version=11

enter image description here

pom.xml

<version>2.1.7.RELEASE</version>

<properties>
    <java.version>11</java.version>
</properties>

`

<dependency>
   <groupId>org.postgresql</groupId>
   <artifactId>postgresql</artifactId>
   <version>9.4-1206-jdbc42</version>
</dependency>

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

The solution is working.

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