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britterbritter
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Initial import of java8 examples
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‎.gitignore‎

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.idea
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*.iml
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target

‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>de.codecentric</groupId>
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<artifactId>java8-examples</artifactId>
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<version>0.1-SNAPSHOT</version>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest-library</artifactId>
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<version>1.3</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎src/main/java/de/codecentric/java8examples/Person.java‎

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package de.codecentric.java8examples;
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import java.util.Calendar;
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import java.util.Date;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 13:41
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* To change this template use File | Settings | File Templates.
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*/
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public class Person {
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public enum Gender {
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MALE, FEMALE
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}
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private final String name;
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private final String lastName;
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private final Date birthDay;
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private Gender gender;
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public Person(String name, String lastName, Date birthDay, Gender gender) {
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this.name = name;
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this.lastName = lastName;
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this.birthDay = birthDay;
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this.gender = gender;
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}
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public String getName() {
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return name;
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}
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public String getLastName() {
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return lastName;
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}
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public Date getBirthDay() {
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return birthDay;
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}
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public Gender getGender() {
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return gender;
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}
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public void setGender(Gender gender) {
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this.gender = gender;
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}
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public int getAge() {
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Calendar now = Calendar.getInstance();
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Calendar birth = Calendar.getInstance();
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birth.setTime(getBirthDay());
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int years = now.get(Calendar.YEAR) - birth.get(Calendar.YEAR);
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if(now.get(Calendar.MONTH) > birth.get(Calendar.MONTH) ||
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now.get(Calendar.MONTH) == birth.get(Calendar.MONTH) && birth.get(Calendar.DATE) > now.get(Calendar.DATE)) {
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years--;
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}
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return years;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Person person = (Person) o;
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if (birthDay != null ? !birthDay.equals(person.birthDay) : person.birthDay != null) return false;
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if (gender != person.gender) return false;
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if (lastName != null ? !lastName.equals(person.lastName) : person.lastName != null) return false;
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if (name != null ? !name.equals(person.name) : person.name != null) return false;
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return true;
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}
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@Override
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public int hashCode() {
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int result = name != null ? name.hashCode() : 0;
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result = 31 * result + (lastName != null ? lastName.hashCode() : 0);
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result = 31 * result + (birthDay != null ? birthDay.hashCode() : 0);
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result = 31 * result + (gender != null ? gender.hashCode() : 0);
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return result;
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}
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@Override
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public String toString() {
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return "Person{" +
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"name='" + name + '\'' +
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", lastName='" + lastName + '\'' +
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", birthDay=" + birthDay +
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", gender=" + gender +
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'}';
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}
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/AbstractGreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 14:59
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* To change this template use File | Settings | File Templates.
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*/
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abstract class AbstractGreetingService implements GreetingService {
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@Override
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public abstract String greet();
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/AlternativeGreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 15:55
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* To change this template use File | Settings | File Templates.
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*/
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public interface AlternativeGreetingService {
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default String greet() {
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return "Alternative Greeting!";
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}
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/DefaultGreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 14:51
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* To change this template use File | Settings | File Templates.
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*/
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public class DefaultGreetingService implements GreetingService {
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// nothing to implement here...
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/DerivedGreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 15:01
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* To change this template use File | Settings | File Templates.
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*/
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public class DerivedGreetingService extends AbstractGreetingService {
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@Override
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public String greet() {
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return "Salut le monde!";
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}
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/ExtendedGreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 14:57
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* To change this template use File | Settings | File Templates.
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*/
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public class ExtendedGreetingService implements GreetingService {
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private String name;
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public ExtendedGreetingService(String name) {
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this.name = name;
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}
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@Override
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public String greet() {
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return "Hello " + name + "!";
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}
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}

‎src/main/java/de/codecentric/java8examples/defaultmethods/GreetingService.java‎

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package de.codecentric.java8examples.defaultmethods;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 14:51
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* To change this template use File | Settings | File Templates.
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*/
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public interface GreetingService {
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default String greet() {
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return "Hello World!";
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}
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}

‎src/main/java/de/codecentric/java8examples/lambdas/EventLambdas.java‎

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package de.codecentric.java8examples.lambdas;
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import javax.swing.*;
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/**
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* Created with IntelliJ IDEA.
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* User: bene
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* Date: 04.10.13
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* Time: 15:57
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* To change this template use File | Settings | File Templates.
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*/
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public class EventLambdas extends JFrame {
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private int clicks = 0;
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public EventLambdas() {
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JButton btn = new JButton("0");
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btn.setSize(50, 50);
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add(btn);
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// lambda magic goes here:
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btn.addActionListener(e -> {
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btn.setText(Integer.toString(clicks++));
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});
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setSize(100, 100);
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pack();
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setVisible(true);
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setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
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}
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public static void main(String[] args) {
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new EventLambdas();
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}
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}

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