4.0.0 com.baeldung javaslang 1.0 javaslang junit junit 4.12 test org.hamcrest hamcrest-all 1.3 io.javaslang javaslang 2.1.0-alpha io.javaslang javaslang-test ${javaslang.test.version} 2.0.5 org.apache.maven.plugins maven-compiler-plugin 3.3 1.8 1.8