4.0.0 baeldung spring-check-null 0.0.1-SNAPSHOT jar spring-check-if-a-property-is-null Calling getters using Introspector org.springframework.boot spring-boot-starter-parent 1.5.3.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin