sem04 almost
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@ -170,8 +170,78 @@ private static final class RowMismatchException extends RuntimeException {
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\end{enumerate}
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\textbf{Вариант исполнения класса в приложении \ref{appendix:ct1}}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание объекта класса}]
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\textbf{Вариант маршрута решения задачи}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Описание класса исключения логина}]
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public static class WrongLoginException extends RuntimeException {
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private int currentLength;
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public WrongLoginException(int currentLength) {
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super();
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this.currentLength = currentLength;
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}
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@Override
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public String getMessage() {
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return String.format("Your login is of incorrect length, expected < 20, given %d.",
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currentLength);
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}
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Формирование сообщения для класса исключения пароля}]
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public static class WrongPasswordException extends RuntimeException {
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private int currentLength;
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private boolean matchConfirm;
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public WrongPasswordException(int currentLength, boolean matchConfirm) {
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super();
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this.currentLength = currentLength;
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this.matchConfirm = matchConfirm;
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}
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@Override
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public String getMessage() {
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boolean badlen = currentLength <= 20;
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return String.format("Your password is of %scorrect length%s %d. Password %smatch the confirmation.",
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((badlen) ? "in" : ""),
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((badlen) ? ", expected > 20, given" : ","),
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currentLength,
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(matchConfirm) ? "" : "doesn't ");
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}
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание тестовой среды}]
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public static void main(String[] args) {
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String[][] credentials = {
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{"ivan", "1i2v3a4n5i6v7a8n91011", "1i2v3a4n5i6v7a8n91011"}, //correct
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{"1i2v3a4n5i6v7a8n91011", "", ""}, //wrong login length
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{"ivan", "1i2v3a4n5i6v7a8n91011", "1i2v3a4n5"}, //confirm mismatch
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{"ivan", "1i2v3a4n5", "1i2v3a4n5"},//wrong password length
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{"ivan", "1i2v3a4n5", "1i"} //wrong password length and confirm mismatch
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};
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for (int i = 0; i < credentials.length; i++) {
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try {
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System.out.println(checkCredentials(credentials[i][0], credentials[i][1], credentials[i][2]));
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} catch (WrongLoginException e) {
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e.printStackTrace();
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} catch (WrongPasswordException e) {
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System.out.println(e.getMessage());
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}
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}
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Метод проверки}]
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public static boolean checkCredentials(String login, String password, String confirmPassword) {
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boolean conf = password.equals(confirmPassword);
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int llen = login.length();
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int plen = password.length();
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if (llen >= 20)
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throw new WrongLoginException(llen);
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else if (plen < 20 || !conf)
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throw new WrongPasswordException(plen, conf);
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else
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return true;
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}
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\end{lstlisting}
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\end{itemize}
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\subsubsection{Задание 2}
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@ -198,9 +268,89 @@ private static final class RowMismatchException extends RuntimeException {
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\end{itemize}
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\item Вывести в консоль итоговое количество совершённых покупок после выполнения основного кода приложения.
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\end{enumerate}
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\textbf{Вариант исполнения класса в приложении \ref{appendix:ct1}}
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\textbf{Вариант исполнения класса в приложении \ref{appendix:ct1}}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание объекта класса}]
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\textbf{Вариант маршрута решения задачи}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание базовых классов (идентично)}]
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private static class Item {
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String name;
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int cost;
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public Item(String name, int cost) {
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this.name = name;
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this.cost = cost;
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}
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@Override
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public String toString() {
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return "Item{name='" + name + "', cost=" + cost + "}";
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}
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание пользовательских исключений}]
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public static class CustomerException extends RuntimeException {
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public CustomerException(String message) {
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super(message);
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}
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Создание массивов}]
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private final static Customer[] people = {
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new Customer("Ivan", 20, "+1-222-333-44-55"),
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new Customer("Petr", 30, "+2-333-444-55-66"),
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};
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private final static Item[] items = {
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new Item("Ball", 100),
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new Item("Sandwich", 1000),
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new Item("Table", 10000),
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new Item("Car", 100000),
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new Item("Rocket", 10000000)
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};
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private static Order[] orders = new Order[5];
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Описание тестовой среды}]
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Object[][] info = {
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{people[0], items[0], 1}, //good
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{people[1], items[1], -1}, //bad amount -1
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{people[0], items[2], 150}, //bad amount >100
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{people[1], new Item("Flower", 10), 1}, //no item
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{new Customer("Fedor", 40, "+3-444-555-66-77"), items[3], 1}, //no customer
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};
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int capacity = 0;
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int i = 0;
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while (capacity != orders.length - 1 || i != info.length) {
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try {
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orders[capacity] = buy((Customer) info[i][0], (Item) info[i][1], (int) info[i][2]);
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capacity++;
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} catch (ProductException e) {
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e.printStackTrace();
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} catch (AmountException e) {
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orders[capacity++] = buy((Customer) info[i][0], (Item) info[i][1], 1);
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} catch (CustomerException e) {
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throw new RuntimeException(e);
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} finally {
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System.out.println("Orders made: " + capacity);
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}
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++i;
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}
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\end{lstlisting}
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Написание и отладка основного метода}]
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private static boolean isInArray(Object[] arr, Object o) {
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for (int i = 0; i < arr.length; i++)
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if (arr[i].equals(o)) return true;
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return false;
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}
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public static Order buy(Customer who, Item what, int howMuch) {
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if (!isInArray(people, who))
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throw new CustomerException("Unknown customer: " + who);
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if (!isInArray(items, what))
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throw new ProductException("Unknown item: " + what);
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if (howMuch < 0 || howMuch > 100)
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throw new AmountException("Incorrect amount: " + howMuch);
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return new Order(who, what, howMuch);
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}
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\end{lstlisting}
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\end{itemize}
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@ -221,11 +371,50 @@ private static final class RowMismatchException extends RuntimeException {
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\textbf{Все варианты решения приведены в тексте семинара выше}
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\item [15 мин] 1. В класс покупателя добавить перечисление с гендерами, добавить в сотрудника свойство «пол» со значением созданного перечисления. Добавить геттеры, сеттеры.
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={}]
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\end{lstlisting}
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\item [20-25 мин] 2. Добавить в основную программу перечисление с праздниками (Новый Год, 8 марта, 23 февраля), написать метод, принимающий массив сотрудников, поздравляющий всех сотрудников с Новым Годом, женщин с 8 марта, а мужчин с 23 февраля.
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={}]
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Свойства сотрудника}]
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enum Genders{MALE, FEMALE};
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// ...
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Genders gender;
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public Employee(String name, String midName, String surName, String phone, String position, int salary, int birth, Genders gender) {
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// ...
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this.gender = gender;
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}
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public Genders getGender() {
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return gender;
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}
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public void setGender(Genders gender) {
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this.gender = gender;
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}
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\end{lstlisting}
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\item [20-25 мин] 2. Добавить в основную программу перечисление с праздниками (нет праздника, Новый Год, 8 марта, 23 февраля), написать метод, принимающий массив сотрудников, поздравляющий всех сотрудников с Новым Годом, женщин с 8 марта, а мужчин с 23 февраля, если сегодня соответствующий день.
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\begin{lstlisting}[language=Java,style=JCodeStyle,caption={Праздники}]
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enum Parties{NONE, NEW_YEAR, MARCH_8, FEB_23}
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private static final Parties today = Parties.NONE;
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private static void celebrate(Employee[] emp) {
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for (int i = 0; i < emp.length; i++) {
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switch (today) {
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case NEW_YEAR:
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System.out.println(emp[i].name + ", happy New Year!");
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break;
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case FEB_23:
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if (emp[i].gender == Employee.Genders.MALE)
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System.out.println(emp[i].name + ", happy February 23rd!");
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break;
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case MARCH_8:
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if (emp[i].gender == Employee.Genders.FEMALE)
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System.out.println(emp[i].name + ", happy march 8th!");
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break;
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default:
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System.out.println(emp[i].name + ", celebrate this morning!");
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}
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}
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}
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\end{lstlisting}
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\end{enumerate}
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\end{itemize}
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@ -0,0 +1,68 @@
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package ru.gb.jcore;
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public class SignInWorker {
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public static class WrongPasswordException extends RuntimeException {
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private int currentLength;
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private boolean matchConfirm;
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public WrongPasswordException(int currentLength, boolean matchConfirm) {
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super();
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this.currentLength = currentLength;
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this.matchConfirm = matchConfirm;
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}
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@Override
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public String getMessage() {
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boolean badlen = currentLength <= 20;
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return String.format("Your password is of %scorrect length%s %d. Password %smatch the confirmation.",
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((badlen) ? "in" : ""),
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((badlen) ? ", expected > 20, given" : ","),
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currentLength,
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(matchConfirm) ? "" : "doesn't ");
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}
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}
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public static class WrongLoginException extends RuntimeException {
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private int currentLength;
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public WrongLoginException(int currentLength) {
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super();
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this.currentLength = currentLength;
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}
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@Override
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public String getMessage() {
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return String.format("Your login is of incorrect length, expected < 20, given %d.",
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currentLength);
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}
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}
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public static boolean checkCredentials(String login, String password, String confirmPassword) {
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boolean conf = password.equals(confirmPassword);
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int llen = login.length();
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int plen = password.length();
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if (llen >= 20)
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throw new WrongLoginException(llen);
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else if (plen < 20 || !conf)
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throw new WrongPasswordException(plen, conf);
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else
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return true;
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}
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public static void main(String[] args) {
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String[][] credentials = {
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{"ivan", "1i2v3a4n5i6v7a8n91011", "1i2v3a4n5i6v7a8n91011"}, //correct
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{"1i2v3a4n5i6v7a8n91011", "", ""}, //wrong login length
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{"ivan", "1i2v3a4n5i6v7a8n91011", "1i2v3a4n5"}, //confirm mismatch
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{"ivan", "1i2v3a4n5", "1i2v3a4n5"},//wrong password length
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{"ivan", "1i2v3a4n5", "1i"} //wrong password length and confirm mismatch
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};
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for (int i = 0; i < credentials.length; i++) {
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try {
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System.out.println(checkCredentials(credentials[i][0], credentials[i][1], credentials[i][2]));
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} catch (WrongLoginException e) {
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e.printStackTrace();
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} catch (WrongPasswordException e) {
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System.out.println(e.getMessage());
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}
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}
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}
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}
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@ -0,0 +1,124 @@
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package ru.gb.jcore;
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public class Shop {
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/**
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* Вызвать метод совершения покупки несколько раз таким образом,
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* чтобы заполнить массив покупок возвращаемыми значениями.
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* Обработать исключения следующим образом (в заданном порядке):
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* */
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private static class Customer {
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String name;
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int age;
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String phone;
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public Customer(String name, int age, String phone) {
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this.name = name;
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this.age = age;
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this.phone = phone;
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}
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@Override
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public String toString() {
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return "Customer{name='" + name + '\'' +
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", age=" + age + ", phone='" + phone + "'}";
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}
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}
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private static class Item {
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String name;
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int cost;
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public Item(String name, int cost) {
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this.name = name;
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this.cost = cost;
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}
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@Override
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public String toString() {
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return "Item{name='" + name + "', cost=" + cost + "}";
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}
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}
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private static class Order {
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Customer customer;
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Item item;
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int amount;
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public Order(Customer customer, Item item, int amount) {
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this.customer = customer;
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this.item = item;
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this.amount = amount;
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}
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@Override
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public String toString() {
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return "Order{customer=" + customer +
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", item=" + item + ", amount=" + amount + "}";
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}
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}
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public static class CustomerException extends RuntimeException {
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public CustomerException(String message) { super(message); }
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}
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public static class ProductException extends RuntimeException {
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public ProductException(String message) { super(message); }
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}
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public static class AmountException extends RuntimeException {
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public AmountException(String message) { super(message); }
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}
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private final static Customer[] people = {
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new Customer("Ivan", 20, "+1-222-333-44-55"),
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new Customer("Petr", 30, "+2-333-444-55-66"),
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};
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private final static Item[] items = {
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new Item("Ball", 100),
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new Item("Sandwich", 1000),
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new Item("Table", 10000),
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new Item("Car", 100000),
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new Item("Rocket", 10000000)
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};
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private static Order[] orders = new Order[5];
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private static boolean isInArray(Object[] arr, Object o) {
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for (int i = 0; i < arr.length; i++)
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if (arr[i].equals(o)) return true;
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return false;
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}
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public static Order buy(Customer who, Item what, int howMuch) {
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if (!isInArray(people, who))
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throw new CustomerException("Unknown customer: " + who);
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if (!isInArray(items, what))
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throw new ProductException("Unknown item: " + what);
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if (howMuch < 0 || howMuch > 100)
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throw new AmountException("Incorrect amount: " + howMuch);
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return new Order(who, what, howMuch);
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}
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public static void main(String[] args) {
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Object[][] info = {
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{people[0], items[0], 1}, //good
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{people[1], items[1], -1}, //bad amount -1
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{people[0], items[2], 150}, //bad amount >100
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{people[1], new Item("Flower", 10), 1}, //no item
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{new Customer("Fedor", 40, "+3-444-555-66-77"), items[3], 1}, //no customer
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};
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int capacity = 0;
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int i = 0;
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while (capacity != orders.length - 1 || i != info.length) {
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try {
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orders[capacity] = buy((Customer) info[i][0], (Item) info[i][1], (int) info[i][2]);
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capacity++;
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} catch (ProductException e) {
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e.printStackTrace();
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} catch (AmountException e) {
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orders[capacity++] = buy((Customer) info[i][0], (Item) info[i][1], 1);
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} catch (CustomerException e) {
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throw new RuntimeException(e);
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} finally {
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System.out.println("Orders made: " + capacity);
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}
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++i;
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}
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}
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}
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