tutorials-java kr.pe.advenoh 1.0-SNAPSHOT 4.0.0 kr.pe.advenoh java-optional java-optional http://www.example.com UTF-8 1.7.25 1.1.3 1.1.3 junit junit 4.12 test org.slf4j slf4j-api ${org.slf4j-version} org.slf4j jcl-over-slf4j ${org.slf4j-version} ch.qos.logback logback-classic ${logback-classic-version} ch.qos.logback logback-core ${logback-core-version} org.apache.maven.plugins maven-compiler-plugin 3.7.0 10 9 9