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‎JavaLesson012/org/csystem/app/App.java

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/*----------------------------------------------------------------------------------------------------------------------
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Diziye ilkdeğer olarak verilen elemanlar sabit ifadesi olmak zorunda değildir
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.app;
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import org.csystem.app.samples.dateapp.DateUtilApp;
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import java.util.Scanner;
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import static org.csystem.app.samples.dateapp.DateUtilApp.*;
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class App {
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public static void main(String [] args)
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{
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Scanner kb = new Scanner(System.in);
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DateUtilApp.run();
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}
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}
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‎JavaLesson012/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 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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switch (month - 1) {
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case 11:
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dayOfYear += 30;
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case 10:
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dayOfYear += 31;
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case 9:
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dayOfYear += 30;
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case 8:
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dayOfYear += 31;
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case 7:
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dayOfYear += 31;
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case 6:
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dayOfYear += 30;
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case 5:
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dayOfYear += 31;
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case 4:
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dayOfYear += 30;
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case 3:
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dayOfYear += 31;
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case 2:
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dayOfYear += isLeapYear(year) ? 29 : 28;
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case 1:
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dayOfYear += 31;
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}
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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 = 31;
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switch (month) {
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case 4:
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case 6:
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case 9:
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case 11:
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days = 30;
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break;
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case 2:
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days = isLeapYear(year) ? 29 : 28;
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}
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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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}

‎JavaLesson012/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 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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switch (dayOfWeek) {
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case 0:
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System.out.printf("%02d/%02d/%04d Pazar%n", day, month, year);
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break;
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case 1:
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System.out.printf("%02d/%02d/%04d Pazartesi%n", day, month, year);
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break;
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case 2:
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System.out.printf("%02d/%02d/%04d Salı%n", day, month, year);
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break;
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case 3:
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System.out.printf("%02d/%02d/%04d Çarşamba%n", day, month, year);
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break;
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case 4:
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System.out.printf("%02d/%02d/%04d Perşembe%n", day, month, year);
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break;
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case 5:
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System.out.printf("%02d/%02d/%04d Cuma%n", day, month, year);
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break;
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case 6:
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System.out.printf("%02d/%02d/%04d Cumartesi%n", day, month, year);
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break;
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}
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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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‎JavaLesson012/org/csystem/math/Complex.java

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/*----------------------------------------------------------------------------------------------------------------------
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Complex sınıfı
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.math;
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public class Complex {
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public static Complex add(double re1, double im1, double re2, double im2) //İleride gizlenecek
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{
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Complex z = new Complex();
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z.re = re1 + re2;
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z.im = im1 + im2;
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return z;
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}
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public static Complex subtract(double re1, double im1, double re2, double im2) //İleride gizlenecek
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{
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return add(re1, im1, -re2, -im2);
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}
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public double re;
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public double im;
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public Complex()
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{
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}
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public Complex(int a)
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{
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re = a;
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}
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public Complex(int a, int b)
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{
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re = a;
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im = b;
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}
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public Complex getConjugate()
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{
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Complex z = new Complex();
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z.re = re;
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z.im = -im;
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return z;
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}
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public double getNorm()
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{
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return Math.sqrt(re * re + im * im);
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}
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//add
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public static Complex add(double a, Complex z)
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{
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return add(a, 0, z.re, z.im);
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}
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public Complex add(Complex z)
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{
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return add(re, im, z.re, z.im);
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}
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public Complex add(double a)
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{
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return add(re, im, a, 0);
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}
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//subtract
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public static Complex subtract(double a, Complex z)
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{
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return subtract(a, 0, z.re, z.im);
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}
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public Complex subtract(Complex z)
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{
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return subtract(re, im, z.re, z.im);
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}
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public Complex subtract(double a)
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{
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return subtract(re, im, a, 0);
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}
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public void offset(double dxy)
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{
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offset(dxy, dxy);
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}
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public void offset(double dx, double dy)
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{
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re += dx;
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im += dy;
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}
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public String toString()
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{
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return String.format("|%.2f + %.2f * i| = %f", re, im, getNorm());
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}
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}
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‎JavaLesson012/org/csystem/math/geometry/Point.java

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/*----------------------------------------------------------------------------------------------------------------------
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Point sınıfı
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.math.geometry;
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import static java.lang.Math.sqrt;
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public class Point {
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public int x;
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public int y;
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public Point()
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{
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}
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public Point(int a)
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{
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x = a;
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}
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public Point(int a, int b)
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{
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x = a;
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y = b;
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}
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public double distance(Point p)
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{
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return distance(p.x, p.y);
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}
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public double distance(int a, int b)
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{
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return sqrt((x - a) * (x - a) + (y - b) * (y - b));
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}
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public void offset(int dxy)
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{
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offset(dxy, dxy);
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}
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public void offset(int dx, int dy)
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{
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x += dx;
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y += dy;
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}
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public String toString()
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{
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return String.format("{x: %d, y: %d}", x, y);
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}
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}

‎JavaLesson012/org/csystem/math/geometry/PointF.java

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/*----------------------------------------------------------------------------------------------------------------------
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PointF sınıfı
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----------------------------------------------------------------------------------------------------------------------*/
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package org.csystem.math.geometry;
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import static java.lang.Math.sqrt;
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public class PointF {
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public float x;
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public float y;
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public PointF()
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{
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}
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public PointF(float a)
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{
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x = a;
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}
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public PointF(float a, float b)
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{
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x = a;
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y = b;
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}
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public double distance(Point p)
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{
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return distance(p.x, p.y);
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}
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public double distance(float a, float b)
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{
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return sqrt((x - a) * (x - a) + (y - b) * (y - b));
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}
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public void offset(float dxy)
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{
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offset(dxy, dxy);
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}
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public void offset(float dx, float dy)
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{
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x += dx;
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y += dy;
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}
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public String toString()
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{
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return String.format("{x: %f, y: %f}", x, y);
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}
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}

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