Sorted Social App

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>groupId</groupId>
+    <artifactId>Lambdas2-ZCW</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>4.10</version>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/CheckFemale.java

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+public interface CheckFemale extends CheckPerson{
+    @Override
+    default boolean test(Person p) {
+        return p.getGender()== Person.Sex.FEMALE;
+    }
+}

src/main/java/CheckMale.java

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+public class CheckMale implements CheckPerson{
+    @Override
+    public boolean test(Person p) {
+        return p.getGender() == Person.Sex.MALE ;
+    }
+}

src/main/java/CheckMaleOlderThan21.java

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+public class CheckMaleOlderThan21 implements CheckPerson{
+    @Override
+    public boolean test(Person p) {
+        return p.getGender() == Person.Sex.MALE && p.getAge()>21;
+    }
+}

src/main/java/CheckPerson.java

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+public interface CheckPerson {
+
+    boolean test(Person p);
+
+//    boolean testFemale();
+
+
+}

src/main/java/Person.java

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+import java.time.LocalDate;
+import java.time.Period;
+import java.util.Date;
+import java.util.function.Predicate;
+
+public class Person {
+
+    String name;
+    LocalDate birthday;
+    Sex gender;
+    String emailAddress;
+
+    public Person(String name, Sex sex, LocalDate birthday, String emailAddress) {
+        this.name = name;
+        this.gender= sex;
+        this.birthday = birthday;
+        this.emailAddress = emailAddress;
+    }
+
+    public enum Sex {
+        MALE, FEMALE
+    }
+
+
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public LocalDate getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(LocalDate birthday) {
+        this.birthday = birthday;
+    }
+
+    public Sex getGender() {
+        return gender;
+    }
+
+    public void setGender(Sex gender) {
+        this.gender = gender;
+    }
+
+    public String getEmailAddress() {
+        return emailAddress;
+    }
+
+    public void setEmailAddress(String emailAddress) {
+        this.emailAddress = emailAddress;
+    }
+
+    public int getAge() {
+        LocalDate today = LocalDate.now();
+        Period diff = Period.between(birthday, today);
+        return diff.getYears();
+    }
+
+    public void printPerson() {
+        String person = this.toString();
+        System.out.println(person);
+    }
+
+
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                ", birthday=" + birthday +
+                ", gender=" + gender +
+                ", emailAddress='" + emailAddress + '\'' +
+                '}';
+    }
+}

src/main/java/PersonBuilder.java

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+import java.time.LocalDate;
+
+public class PersonBuilder {
+    private String name;
+    private Person.Sex sex;
+    private LocalDate birthday = LocalDate.of(1990, 1, 1);
+    private String emailAddress;
+
+    public PersonBuilder setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public PersonBuilder setSex(Person.Sex sex) {
+        this.sex = sex;
+        return this;
+    }
+
+    public PersonBuilder setBirthday(LocalDate birthday) {
+        this.birthday = birthday;
+        return this;
+    }
+
+    public PersonBuilder setEmailAddress(String emailAddress) {
+        this.emailAddress = emailAddress;
+        return this;
+    }
+
+    public Person createPerson() {
+        return new Person(name, sex, birthday, emailAddress);
+    }
+}

src/main/java/SocialApp.java

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+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Predicate;
+
+public class SocialApp{
+
+    List<Person> roster = new ArrayList<>();
+
+
+    public List<Person> getList() {
+        return roster;
+    }
+
+
+    interface Checker extends CheckPerson {
+
+        boolean test(Person p);
+
+
+        static boolean testMale(Person p){
+            return p.getGender() == Person.Sex.MALE;
+            }
+
+        static boolean testFemale(Person p){
+            return p.getGender()== Person.Sex.FEMALE;
+        }
+        }
+
+
+
+    public void addUser(Person user){
+        roster.add(user);
+    }
+
+    public static void printPersonsOlderThan(List<Person> roster, int age) {
+        Predicate<Person> checkAge = p -> p.getAge() > age;
+        roster.stream().filter(checkAge).forEach(Person::printPerson);
+    }
+
+    public static void printPersonsWithinAgeRange(List<Person> roster, int low, int high) {
+        Predicate<Person> range = p -> low <= p.getAge() && p.getAge() < high;
+        roster.stream().filter(range).forEach(Person::printPerson);
+    }
+
+    public static void printPersonsFemale( List<Person> roster
+//            List<Person> roster, Checker tester
+    ) {
+        Predicate<Person> checkFem = Checker::testFemale;
+        roster.stream().filter(checkFem).forEach(Person::printPerson);
+    }
+
+    public static void printMales21AndUp(List<Person> roster){
+        Predicate<Person> checkMale = Checker::testMale;
+        Predicate<Person> checkAge = p-> p.getAge() > 21;
+
+        roster.stream().filter(checkMale).filter(checkAge).forEach(Person::printPerson);
+    }
+
+    public static void printFemales21AndUp(List<Person> roster){
+        Predicate<Person> checkMale = Checker::testFemale;
+        Predicate<Person> checkAge = p-> p.getAge() > 21;
+
+        roster.stream().filter(checkMale).filter(checkAge).forEach(Person::printPerson);
+    }
+
+    public static void printFemalesBetweenAges(List<Person> roster, int low, int high){
+        Predicate<Person> checkFem = Checker::testFemale;
+        Predicate<Person> range = p -> low <= p.getAge() && p.getAge() < high;
+        roster.stream().filter(checkFem).filter(range).forEach(Person::printPerson);
+
+    }
+
+    public static void printMalesBetweenAges(List<Person> roster, int low, int high){
+        Predicate<Person> checkMale = Checker::testMale;
+        Predicate<Person> range = p -> low <= p.getAge() && p.getAge() < high;
+        roster.stream().filter(checkMale).filter(range).forEach(Person::printPerson);
+
+    }
+
+}