4.0.0 io.github.biezhi learn-java8 pom 1.0-SNAPSHOT java8-lambda java8-optional java8-stream java8-default-methods java8-datetime-api java8-nashorn java8-best-practice java8-proper java8-concurrent java8-growing java8-completablefuture org.projectlombok lombok 1.16.18 provided maven-compiler-plugin 1.8 1.8 UTF-8