4.0.0 core-java-streams-4 0.1.0-SNAPSHOT core-java-streams-collect jar com.baeldung.core-java-modules core-java-modules 0.0.1-SNAPSHOT log4j log4j ${log4j.version} org.junit junit-bom ${junit-jupiter.version} pom import org.assertj assertj-core ${assertj.version} test 3.23.1