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‎JavaLesson016/org/csystem/app/App.java

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/*----------------------------------------------------------------------------------------------------------------------
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Time sınıfı ve test kodu
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.app;
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import org.csystem.util.datetime.Time;
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import java.util.Random;
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class App {
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public static void main(String [] args)
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{
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Random r = new Random();
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for (int i = 0; i < 10; ++i) {
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Time time = Time.randomTime(r);
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System.out.println(time.toLongTimeString());
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}
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}
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}
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‎JavaLesson016/org/csystem/app/samples/commandpromptapp/CommandPrompt.java

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package org.csystem.app.samples.commandpromptapp;
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import org.csystem.util.StringUtil;
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import java.util.Scanner;
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public class CommandPrompt {
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private static final String [] COMMAND_STRINGS = {"length", "reverse", "upper", "lower", "change", "clear"};
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private String m_prompt;
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private final Scanner m_kb;
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private static String getCommandByText(String text)
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{
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if (text.length() < 3)
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return "";
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for (String s : COMMAND_STRINGS)
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if (s.startsWith(text))
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return s;
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return "";
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}
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private void lengthProc(String [] commandsStr)
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{
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if (commandsStr.length != 2) {
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System.out.println("length bir tane argüman almalıdır");
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return;
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}
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System.out.println(commandsStr[1].length());
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}
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private void reverseProc(String [] commandsStr)
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{
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if (commandsStr.length != 2) {
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System.out.println("revere bir tane argüman almalıdır");
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return;
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}
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System.out.println(StringUtil.reverse(commandsStr[1]));
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}
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private void upperProc(String [] commandsStr)
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{
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if (commandsStr.length != 2) {
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System.out.println("upper bir tane argüman almalıdır");
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return;
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}
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System.out.println(commandsStr[1].toUpperCase());
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}
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private void lowerProc(String [] commandsStr)
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{
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if (commandsStr.length != 2) {
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System.out.println("lower bir tane argüman almalıdır");
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return;
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}
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System.out.println(commandsStr[1].toLowerCase());
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}
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private void changeProc(String [] commandsStr)
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{
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if (commandsStr.length != 2) {
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System.out.println("change bir tane argüman almalıdır");
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return;
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}
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m_prompt = commandsStr[1];
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}
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private void clearProc(String [] commandsStr)
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{
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for (int i = 0; i < 30; ++i)
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System.out.println();
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}
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private void doWorkForCommand(String [] commandInfoStr)
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{
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switch (commandInfoStr[0]) {
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case "length":
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lengthProc(commandInfoStr);
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break;
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case "reverse":
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reverseProc(commandInfoStr);
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break;
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case "upper":
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upperProc(commandInfoStr);
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break;
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case "lower":
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lowerProc(commandInfoStr);
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break;
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case "change":
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changeProc(commandInfoStr);
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break;
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case "clear":
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clearProc(commandInfoStr);
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break;
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}
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}
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private void parseCommand(String [] commandInfoStr)
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{
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String cmd = getCommandByText(commandInfoStr[0]);
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if (!cmd.isEmpty()) {
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commandInfoStr[0] = cmd;
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doWorkForCommand(commandInfoStr);
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}
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else
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System.out.println("Geçersiz komut");
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}
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public CommandPrompt(String p)
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{
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m_prompt = p;
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m_kb = new Scanner(System.in);
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}
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public void run()
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{
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System.out.println("C ve Sistem Programcıları Derneği");
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System.out.println("Homework-013 sorusuna ilişkin bir iskelet");
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for (;;) {
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System.out.print(m_prompt + ">");
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String cmd = m_kb.nextLine().trim();
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if (cmd.equals("quit"))
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break;
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parseCommand(cmd.split("[ \t]+"));
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}
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System.out.println("C ve Sistem Programcıları Derneği");
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System.out.println("Tekrar yapıyor musunuz?");
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}
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}

‎JavaLesson016/org/csystem/app/samples/commandpromptapp/CommandPromptApp.java

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package org.csystem.app.samples.commandpromptapp;
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public class CommandPromptApp {
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private CommandPromptApp()
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{
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}
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public static void run()
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{
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CommandPrompt commandPrompt = new CommandPrompt("CSD");
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commandPrompt.run();
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}
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}

‎JavaLesson016/org/csystem/app/samples/dateapp/DateUtil.java

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package org.csystem.app.samples.dateapp;
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public class DateUtil {
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public static int [] daysOfMonths = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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public static int getDayOfWeek(int day, int month, int year)
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{
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int dayOfYear;
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dayOfYear = getDayOfYear(day, month, year);
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if (dayOfYear == -1 || year < 1900)
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return -1;
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for (int y = 1900; y < year; ++y)
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dayOfYear += isLeapYear(y) ? 366 : 365;
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return dayOfYear % 7;
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}
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public static int getDayOfYear(int day, int month, int year)
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{
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if (!isValidDate(day, month, year))
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return -1;
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int dayOfYear = day;
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for (int m = month - 1; m >= 1; --m)
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dayOfYear += daysOfMonths[m];
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if (month > 2 && isLeapYear(year))
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++dayOfYear;
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return dayOfYear;
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}
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public static boolean isValidDate(int day, int month, int year)
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{
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if (day < 1 || day > 31 || month < 1 || month > 12)
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return false;
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int days = month == 2 && isLeapYear(year) ? 29 : daysOfMonths[month];
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return day <= days;
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}
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public static boolean isLeapYear(int year)
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{
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return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
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}
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}

‎JavaLesson016/org/csystem/app/samples/dateapp/DateUtilApp.java

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/*----------------------------------------------------------------------------------------------------------------------
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Sınıf çalışması: Parametresi ile aldığı int türden gün, ay ve yıl bilgilerine ilişkin tarihin aşağıdaki
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açıklamalara göre haftanın hangi gününe geldiğini döndüren getDayOfWeek metodunu yazınız.
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Açıklamalar:
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- Metot geçersiz bir tarih için -1 değerini döndürecektir.
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- Haftanın günü 1.1.1900 ile verilen tarih arasındaki gün sayısının 7 değerine modu alınarak bulunabilir
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- 7 değerine mod alındıktan sonra sıfır Pazar, 1 pazartesi, .., 6 cumartesi günü için
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elde edilecek değerdir
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- 1.1.1900' den önceki tarihler geçersiz kabul edilecektir
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.app.samples.dateapp;
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public class DateUtilApp {
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public static String [] daysOfWeek = {"Pazar", "Pazartesi", "Salı", "Çarşamba", "Perşembe", "Cuma", "Cumartesi"};
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public static String [] monthsTR = {"", "Ocak", "Şubat", "Mart", "Nisan", "Mayıs", "Haziran",
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"Temmuz", "Ağustos", "Eylül", "Ekim", "Kasım", "Aralık"};
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public static String [] monthsEN = {"", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
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public static void displayTR(int day, int month, int year)
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{
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int dayOfWeek = DateUtil.getDayOfWeek(day, month, year);
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if (dayOfWeek == -1) {
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System.out.println("Geçersiz tarih");
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return;
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}
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System.out.printf("%02d %s %04d %s%n", day, monthsTR[month], year, daysOfWeek[dayOfWeek]);
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if (dayOfWeek == 0 || dayOfWeek == 6)
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System.out.println("Bugün kurs var. Tekrar yaptınız mı?");
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else
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System.out.println("Kurs günü yaklaşıyor. Tekrar yapınız!!!!");
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}
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public static void run()
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{
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java.util.Scanner kb = new java.util.Scanner(System.in);
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for (;;) {
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System.out.print("Gün bilgisini giriniz:");
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int day = Integer.parseInt(kb.nextLine());
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if (day == 0)
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break;
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System.out.print("Ay bilgisini giriniz:");
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int month = Integer.parseInt(kb.nextLine());
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System.out.print("Yıl bilgisini giriniz:");
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int year = Integer.parseInt(kb.nextLine());
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displayTR(day, month, year);
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}
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}
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}
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‎JavaLesson016/org/csystem/app/samples/examsimulationapp/ExamSimulation.java

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package org.csystem.app.samples.examsimulationapp;
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import org.csystem.util.ArrayUtil;
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import java.util.Random;
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import java.util.Scanner;
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public class ExamSimulation {
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private final String m_lectureName;
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private int [][] m_grades;
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private double [] m_averages;
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private double m_average;
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private void findAverages()
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{
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int totalNumberOfStudents = 0;
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int totalGrades = 0;
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for (int i = 0; i < m_grades.length; ++i) {
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int total = ArrayUtil.sum(m_grades[i]);
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m_averages[i] = (double)total / m_grades[i].length;
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totalGrades += total;
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totalNumberOfStudents += m_grades[i].length;
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}
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m_average = (double)totalGrades / totalNumberOfStudents;
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}
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private void fillGrades()
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{
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Random r = new Random();
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Scanner kb = new Scanner(System.in);
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System.out.print("Şube sayısını giriniz:");
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m_grades = new int[Integer.parseInt(kb.nextLine())][];
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m_averages = new double[m_grades.length];
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for (int i = 0; i < m_grades.length; ++i) {
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System.out.printf("%d. şube öğrenci sayısını giriniz:", i + 1);
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int count = Integer.parseInt(kb.nextLine());
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m_grades[i] = ArrayUtil.getRandomArray(r, count, 0, 101);
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}
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}
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public ExamSimulation(String name)
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{
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m_lectureName = name;
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}
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public String getLectureName()
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{
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return m_lectureName;
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}
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public int getGrade(int i, int k)
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{
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return m_grades[i][k];
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}
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public double getAverage(int i)
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{
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return m_averages[i];
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}
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public int getNumberOfClasses()
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{
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return m_averages.length;
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}
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public int getNumberOfStudents(int i)
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{
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return m_grades[i].length;
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}
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public double getAverage()
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{
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return m_average;
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}
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public void run()
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{
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fillGrades();
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findAverages();
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}
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public void displayGrades()
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{
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System.out.printf("%s dersi sınav notları:%n", m_lectureName);
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System.out.println("*************************************************************");
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for (int i = 0; i < m_grades.length; ++i) {
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System.out.printf("%d. şube notları:", i + 1);
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ArrayUtil.display(3, m_grades[i]);
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}
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System.out.println("*************************************************************");
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}
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public void displayStatus()
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{
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displayGrades();
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System.out.printf("%s dersi için ortalamalar%n", m_lectureName);
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System.out.println("*************************************************************");
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for (int i = 0; i < m_averages.length; ++i)
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System.out.printf("%d.şube not ortalaması:%f%n", i + 1, m_averages[i]);
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System.out.printf("Okul ortalaması:%f%n", m_average);
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System.out.println("*************************************************************");
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}
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}

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