test pass

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="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>
+    <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>
+    <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>
+</project>

lambdas2zcw/src/main/java/CheckPerson.java

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+public interface CheckPerson {
+    //this is search criteria
+    Boolean test (Person person);
+
+
+}

lambdas2zcw/src/main/java/MainClass.java

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+import java.time.LocalDate;
+import java.time.Month;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class MainClass {
+    public static void printPersons(
+            List<Person> roster, CheckPerson tester) {
+        for (Person p : roster) {
+            if (tester.test(p)) {
+                p.printPerson();
+            }
+        }
+    }
+    //using lambdas
+//    public List<Person> getMyPeepsOver18(List<Person> myPeeps) {
+//        List<Person> myPeepsOver18 = myPeeps.stream().filter(p -> p.getAge() >= 18).collect(Collectors.toList());
+//        return myPeepsOver18;
+//    }
+
+    public static void main(String[] args) {
+        Person tp, tp1, tp2, tp3, tp4, tp5;
+        ArrayList<Person> myPeeps = new ArrayList<>();
+
+        tp = new Person("rashmi bapat", LocalDate.of(1994, Month.APRIL, 19), Person.Sex.FEMALE, "rbrashmi1@rediffmail.com");
+        //TODO create tp1,tp2,tp3,tp4;
+        tp1 = new Person("manasi bhide", LocalDate.of(1985, Month.AUGUST, 12), Person.Sex.FEMALE, "manasib123@yahoo.com");
+        tp2 = new Person("kedar limaye", LocalDate.of(1983, Month.DECEMBER, 2), Person.Sex.MALE, "klimaye@gmail.com");
+        tp3 = new Person("keya param", LocalDate.of(2010, Month.JUNE, 23), Person.Sex.FEMALE, "k23parm@gmx.com");
+        tp4 = new Person("raja kotak", LocalDate.of(2015, Month.FEBRUARY, 28), Person.Sex.MALE, "rajaKotak11@yahoo.com");
+        tp5 = new Person("risha kapoor", LocalDate.of(2011, Month.JULY, 25), Person.Sex.FEMALE, "risha23@gmail.com");
+        myPeeps.add(tp);
+        //add rest tp1,...
+        myPeeps.add(tp1);
+        myPeeps.add(tp2);
+        myPeeps.add(tp3);
+        myPeeps.add(tp4);
+        myPeeps.add(tp5);
+
+
+        class checkForOver18 implements CheckPerson {
+            @Override
+            public Boolean test(Person person) {
+                return person.getAge() >= 18;
+            }
+        }
+        printPersons(myPeeps, new checkForOver18());
+
+        //example using anonymous class
+        printPersons(myPeeps, new CheckPerson() {
+            @Override
+            public Boolean test(Person person) {
+                return person.getAge() >= 18;
+            }
+        });
+
+        //example using lambda
+        printPersons(myPeeps, person -> person.getAge() >= 18);
+    }
+}