Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project webservice: Fatal error compiling: error: invalid target release: 16 -> [Help 1] code example

Example: 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>