Complete

lambdas2zcw/lambdas2zcw.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="Lambdas2-ZCW" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.9" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.github.stefanbirkner:system-rules:1.19.0" level="project" />
+  </component>
+</module>

lambdas2zcw/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.zipcodewilmington</groupId>
+    <artifactId>lambdas2zcw</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.9</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.github.stefanbirkner</groupId>
+            <artifactId>system-rules</artifactId>
+            <version>1.19.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

lambdas2zcw/src/main/java/CheckPerson.java

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+public interface CheckPerson {
+
+    Boolean test(Person person);
+}

lambdas2zcw/src/main/java/Main.java

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+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Main {
+
+    public static void printPeople(List<Person> roster, CheckPerson tester) {
+        for (Person p : roster) {
+            if (tester.test(p)) {
+                p.printPerson();
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        Person aswomeSister, secondBestSister, thirdBestSister, olderSister;
+        ArrayList<Person> myFamily = new ArrayList<>();
+
+        aswomeSister = new Person("Charlotte Beale", LocalDate.of(1982, java.time.Month.AUGUST, 20), Person.Sex.FEMALE, "cbeale2000@gmail.com");
+        secondBestSister = new Person("Ruth Beale", LocalDate.of(1980, java.time.Month.MARCH, 07), Person.Sex.FEMALE, "rbeale@gmail.com");
+        thirdBestSister = new Person("Kesha Beale", LocalDate.of(1978, java.time.Month.AUGUST, 17), Person.Sex.FEMALE, "kbeale@gmail.com");
+        olderSister = new Person("Kathleen Beale", LocalDate.of(1976, java.time.Month.FEBRUARY, 23), Person.Sex.FEMALE, "kbeale@hotmail.com");
+        myFamily.add(aswomeSister);
+        myFamily.add(secondBestSister);
+        myFamily.add(thirdBestSister);
+        myFamily.add(olderSister);
+
+
+        class checkForOver18 implements CheckPerson {
+
+            @Override
+            public Boolean test(Person person) {
+                return person.getAge() >= 18;
+            }
+        }
+        printPeople(myFamily, new checkForOver18());
+
+        printPeople(myFamily, new CheckPerson() {
+            @Override
+            public Boolean test(Person person) {
+                return person.getAge() >= 18;
+            }
+        });
+        printPeople(myFamily, person -> person.getAge() >= 45);
+    }
+}