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‎src/main/java/j/facade/Main.java

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package j.facade;
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import j.facade.pagemaker.PageMaker;
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public class Main {
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public static void main(String[] args) {
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PageMaker.makeWelcomePage("[email protected]", "welcome.html");
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}
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}

‎src/main/java/j/facade/maildata.txt

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[email protected]=Hiroshi Yuki
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[email protected]=Hanako Sato
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[email protected]=Tomura
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[email protected]=Mamoru Takahashi

‎src/main/java/j/facade/pagemaker/Database.java

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package j.facade.pagemaker;
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import java.io.FileReader;
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import java.io.IOException;
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import java.util.Properties;
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public class Database {
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private Database() {
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}
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// データベース名からPropertiesを得る
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public static Properties getProperties(String dbname) throws IOException {
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String filename = dbname + ".txt";
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Properties prop = new Properties();
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prop.load(new FileReader(filename));
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return prop;
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}
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}

‎src/main/java/j/facade/pagemaker/HtmlWriter.java

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package j.facade.pagemaker;
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import java.io.IOException;
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import java.io.Writer;
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public class HtmlWriter {
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private Writer writer;
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public HtmlWriter(Writer writer) {
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this.writer = writer;
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}
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// タイトルの出力
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public void title(String title) throws IOException {
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writer.write("<!DOCTYPE html>");
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writer.write("<html>");
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writer.write("<head>");
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writer.write("<title>" + title + "</title>");
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writer.write("</head>");
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writer.write("<body>");
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writer.write("\n");
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writer.write("<h1>" + title + "</h1>");
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writer.write("\n");
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}
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// 段落の出力
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public void paragraph(String msg) throws IOException {
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writer.write("<p>" + msg + "</p>");
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writer.write("\n");
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}
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// リンクの出力
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public void link(String href, String caption) throws IOException {
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paragraph("<a href=\"" + href + "\">" + caption + "</a>");
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}
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// メールアドレスの出力
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public void mailto(String mailaddr, String username) throws IOException {
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link("mailto:" + mailaddr, username);
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}
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// 閉じる
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public void close() throws IOException {
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writer.write("</body>");
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writer.write("</html>");
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writer.write("\n");
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writer.close();
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}
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}

‎src/main/java/j/facade/pagemaker/PageMaker.java

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package j.facade.pagemaker;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.Properties;
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public class PageMaker {
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private PageMaker() {
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}
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public static void makeWelcomePage(String mailaddr, String filename) {
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try {
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Properties mailprop = Database.getProperties("maildata");
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String username = mailprop.getProperty(mailaddr);
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HtmlWriter writer = new HtmlWriter(new FileWriter(filename));
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writer.title(username + "'s web page");
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writer.paragraph("Welcome to " + username + "'s web page!");
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writer.paragraph("Nice to meet you!");
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writer.mailto(mailaddr, username);
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writer.close();
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System.out.println(filename + " is created for " + mailaddr + " (" + username + ")");
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}

‎src/main/java/j/facade/welcome.html

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<!DOCTYPE html>
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<html>
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<head><title>Hiroshi Yuki's web page</title></head>
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<body>
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<h1>Hiroshi Yuki's web page</h1>
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<p>Welcome to Hiroshi Yuki's web page!</p>
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<p>Nice to meet you!</p>
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<p><a href="mailto:[email protected]">Hiroshi Yuki</a></p>
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</body>
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</html>

‎src/main/java/j/observer/inheritance/DigitObserver.java

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package j.observer.inheritance;
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public class DigitObserver implements Observer {
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@Override
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public void update(NumberGenerator generator) {
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System.out.println("DigitObserver:" + generator.getNumber());
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {
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}
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}
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}

‎src/main/java/j/observer/inheritance/GraphObserver.java

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package j.observer.inheritance;
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public class GraphObserver implements Observer {
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@Override
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public void update(NumberGenerator generator) {
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System.out.print("GraphObserver:");
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int count = generator.getNumber();
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for (int i = 0; i < count; i++) {
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System.out.print("*");
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}
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System.out.println("");
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {
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}
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}
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}

‎src/main/java/j/observer/inheritance/Main.java

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package j.observer.inheritance;
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public class Main {
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public static void main(String[] args) {
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NumberGenerator generator = new RandomNumberGenerator();
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Observer observer1 = new DigitObserver();
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Observer observer2 = new GraphObserver();
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generator.addObserver(observer1);
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generator.addObserver(observer2);
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generator.execute();
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}
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}

‎src/main/java/j/observer/inheritance/NumberGenerator.java

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package j.observer.inheritance;
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import java.util.ArrayList;
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import java.util.List;
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public abstract class NumberGenerator {
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// 保持しているObserverたち
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private List<Observer> observers = new ArrayList<>();
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// Observerを追加する
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public void addObserver(Observer observer) {
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observers.add(observer);
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}
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// Observerを削除する
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public void deleteObserver(Observer observer) {
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observers.remove(observer);
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}
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// Observerへ通知する
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public void notifyObservers() {
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for (Observer o : observers) {
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o.update(this);
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}
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}
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// 数を取得する
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public abstract int getNumber();
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// 数を生成する
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public abstract void execute();
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}

‎src/main/java/j/observer/inheritance/Observer.java

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package j.observer.inheritance;
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public interface Observer {
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public abstract void update(NumberGenerator generator);
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}

‎src/main/java/j/observer/inheritance/RandomNumberGenerator.java

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package j.observer.inheritance;
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import java.util.Random;
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public class RandomNumberGenerator extends NumberGenerator {
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private Random random = new Random(); // 乱数生成器
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private int number; // 現在の数
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// 数を取得する
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@Override
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public int getNumber() {
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return number;
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}
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// 数を生成する
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@Override
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public void execute() {
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for (int i = 0; i < 20; i++) {
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number = random.nextInt(50);
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notifyObservers();
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}
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}
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}

‎src/main/java/j/prototype/inheritance/Main.java

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package j.prototype.inheritance;
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import j.prototype.inheritance.framework.Manager;
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import j.prototype.inheritance.framework.Product;
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public class Main {
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public static void main(String[] args) {
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// 準備
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Manager manager = new Manager();
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UnderlinePen upen = new UnderlinePen('-');
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MessageBox mbox = new MessageBox('*');
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MessageBox sbox = new MessageBox('/');
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// 登録
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manager.register("strong message", upen);
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manager.register("warning box", mbox);
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manager.register("slash box", sbox);
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// 生成と使用
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Product p1 = manager.create("strong message");
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p1.use("Hello, world.");
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Product p2 = manager.create("warning box");
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p2.use("Hello, world.");
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Product p3 = manager.create("slash box");
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p3.use("Hello, world.");
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}
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}

‎src/main/java/j/prototype/inheritance/MessageBox.java

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package j.prototype.inheritance;
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import j.prototype.inheritance.framework.Product;
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public class MessageBox implements Product {
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private char decochar;
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public MessageBox(char decochar) {
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this.decochar = decochar;
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}
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@Override
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public void use(String s) {
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int decolen = 1 + s.length() + 1;
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for (int i = 0; i < decolen; i++) {
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System.out.print(decochar);
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}
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System.out.println();
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System.out.println(decochar + s + decochar);
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for (int i = 0; i < decolen; i++) {
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System.out.print(decochar);
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}
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System.out.println();
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}
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@Override
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public Product createCopy() {
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Product p = null;
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try {
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p = (Product) clone();
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} catch (CloneNotSupportedException e) {
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e.printStackTrace();
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}
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return p;
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}
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}

‎src/main/java/j/prototype/inheritance/UnderlinePen.java

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package j.prototype.inheritance;
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import j.prototype.inheritance.framework.Product;
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public class UnderlinePen implements Product {
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private char ulchar;
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public UnderlinePen(char ulchar) {
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this.ulchar = ulchar;
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}
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@Override
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public void use(String s) {
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int ulen = s.length();
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System.out.println(s);
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for (int i = 0; i < ulen; i++) {
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System.out.print(ulchar);
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}
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System.out.println();
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}
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@Override
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public Product createCopy() {
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Product p = null;
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try {
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p = (Product) clone();
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} catch (CloneNotSupportedException e) {
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e.printStackTrace();
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}
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return p;
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}
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}

‎src/main/java/j/prototype/inheritance/framework/Manager.java

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package j.prototype.inheritance.framework;
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import java.util.HashMap;
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import java.util.Map;
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public class Manager {
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private Map<String, Product> showcase = new HashMap<>();
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public void register(String name, Product prototype) {
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showcase.put(name, prototype);
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}
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public Product create(String prototypeName) {
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Product p = showcase.get(prototypeName);
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return p.createCopy();
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}
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}

‎src/main/java/j/prototype/inheritance/framework/Product.java

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package j.prototype.inheritance.framework;
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public interface Product extends Cloneable {
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public abstract void use(String s);
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public abstract Product createCopy();
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}

‎src/main/java/j/state/delegate/Context.java

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package j.state.delegate;
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public interface Context {
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public abstract void setClock(int hour); // 時刻の設定
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public abstract void changeState(State state); // 状態変化
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public abstract void callSecurityCenter(String msg); // 警備センター警備員呼び出し
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public abstract void recordLog(String msg); // 警備センター記録
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}

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