Answers for "heroku Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile"

Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.20.1:test (default-test) on project upload

<plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.19.1</version>
        </plugin>
  </plugins>

Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.1:compile (default-compile) on project a2: Compilation failure [ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

set JAVA_HOME=<ABSOLUTE_PATH_TO_JDK>