Захаров Данила. Модуль 04

task01/src/com/example/task01/Point.java

@@ -4,8 +4,27 @@
  * Класс точки на плоскости
  */
 public class Point {
-    int x;
-    int y;
+    private int x;
+    private int y;
+
+    public Point(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    void flip(){
+        int temp = x;
+        x = - y;
+        y = - temp;
+    }
+
+    double distance(Point point){
+        return Math.sqrt(Math.pow(point.x - x, 2) + Math.pow(point.y - y, 2));
+    }
+
+    public String toString(){
+        return  x + y + "";
+    }
 
     void print() {
         String pointToString = String.format("(%d, %d)", x, y);

task01/src/com/example/task01/Task01Main.java

@@ -2,15 +2,13 @@
 
 public class Task01Main {
     public static void main(String[] args) {
-        Point p1 = new Point();
-        p1.x = 10;
-        p1.y = 45;
-        Point p2 = new Point();
-        p2.x = 78;
-        p2.y = 12;
+        Point p1 = new Point(5,-7);
+        Point p2 = new Point(78,12);
 
         System.out.println("Point 1:");
         p1.print();
+        p1.flip();
+        p1.print();
         System.out.println(p1);
         System.out.println("Point 2:");
         p2.print();

task02/src/com/example/task02/Task02Main.java

@@ -3,5 +3,32 @@
 public class Task02Main {
     public static void main(String[] args) {
 
+        TimeSpan timeSpan = new TimeSpan(0, 0, 0);
+
+        System.out.println("Time span 1 is:\n" + timeSpan.toString());
+
+        System.out.println("hours before setter is " + timeSpan.getHour());
+        System.out.println("minutes is " + timeSpan.getMinute());
+        System.out.println("seconds is " + timeSpan.getSecond());
+        System.out.println();
+
+        timeSpan.setHour(18);
+        timeSpan.setMinute(80);
+        timeSpan.setSecond(90);
+
+        System.out.println("hours after setter is:" + timeSpan.getHour());
+        System.out.println("minutes after setter is:" + timeSpan.getMinute());
+        System.out.println("seconds after setter is:" + timeSpan.getSecond());
+
+        TimeSpan timeSpan2 = new TimeSpan(timeSpan.getHour(), timeSpan.getMinute(), timeSpan.getSecond());
+
+        timeSpan2.add(timeSpan);
+        System.out.println("Time span 2 is:\n" + timeSpan2);
+        timeSpan2.subtract(timeSpan);
+
+
+        System.out.println("Time span 2 is:\n" + timeSpan2);
+
+
     }
 }

task02/src/com/example/task02/TimeSpan.java

@@ -0,0 +1,94 @@
+package com.example.task02;
+
+public class TimeSpan {
+    private int hour;
+    private int minute;
+    private int second;
+
+    public TimeSpan(int hour, int minute, int second) {
+        this.hour = hour;
+        this.minute = minute;
+        this.second = second;
+        normalize();
+    }
+
+    public void setSecond(int second) {
+        if (second < 0) {
+            throw new IllegalArgumentException("секунды не могут быть отрицательными");
+        }
+        this.second = second;
+        normalize();
+    }
+
+    public void setMinute(int minute) {
+        if (minute < 0) {
+            throw new IllegalArgumentException("минуты не могут быть отрицательными");
+        }
+        this.minute = minute;
+        normalize();
+    }
+
+    public void setHour(int hour) {
+        if (hour >= 0) {
+            this.hour = hour;
+        } else {
+            throw new IllegalArgumentException("часы не могут быть отрицательными");
+        }
+    }
+
+    public int getHour() {
+        return hour;
+    }
+
+    public int getMinute() {
+        return minute;
+    }
+
+    public int getSecond() {
+        return second;
+    }
+
+    // Метод для нормализации времени
+    private void normalize() {
+        if (this.second >= 60) {
+            this.minute += this.second / 60;
+            this.second = this.second % 60;
+        } else if (this.second < 0) {
+            this.minute -= Math.abs(this.second) / 60 + 1;
+            this.second = 60 - Math.abs(this.second) % 60;
+        }
+
+        if (this.minute >= 60) {
+            this.hour += this.minute / 60;
+            this.minute = this.minute % 60;
+        } else if (this.minute < 0) {
+            this.hour -= Math.abs(this.minute) / 60 + 1;
+            this.minute = 60 - Math.abs(this.minute) % 60;
+        }
+    }
+
+    public void add(TimeSpan time){
+        this.hour += time.getHour();
+        this.minute += time.getMinute();
+        this.second += time.getSecond();
+        normalize();
+    }
+
+    public void subtract(TimeSpan time){
+        this.hour -= time.getHour();
+        this.minute -= time.getMinute();
+        this.second -= time.getSecond();
+
+        if (this.hour < 0) {
+            this.hour = 0;
+            this.minute = 0;
+            this.second = 0;
+        } else {
+            normalize();
+        }
+    }
+
+    public String toString() {
+        return String.format("%02d:%02d:%02d", this.hour, this.minute, this.second);
+    }
+}

task03/src/com/example/task03/ComplexNum.java

@@ -0,0 +1,42 @@
+package com.example.task03;
+
+public class ComplexNum {
+    private double real;
+    private double imag;
+
+    public ComplexNum(double real, double imag) {
+        this.real = real;
+        this.imag = imag;
+    }
+    public double getReal() {
+        return real;
+    }
+    public void setReal(double real) {
+        this.real = real;
+    }
+    public double getImag() {
+        return imag;
+    }
+    public void setImag(double imag) {
+        this.imag = imag;
+    }
+
+    public static ComplexNum add(ComplexNum a, ComplexNum b) {
+        double newReal = a.real + b.real;
+        double newImag = a.imag + b.imag;
+        return new ComplexNum(newReal, newImag);
+    }
+
+    public static ComplexNum multiply(ComplexNum a, ComplexNum b) {
+        double newReal = (a.real * b.real) - (a.imag * b.imag);
+        double newImag = (a.real * b.imag) + (a.imag * b.real);
+        return new ComplexNum(newReal, newImag);
+    }
+
+    public String toString() {
+        return String.format("%.1f + %.1fi", real, imag);
+    }
+
+
+
+}

task03/src/com/example/task03/Task03Main.java

@@ -2,6 +2,11 @@
 
 public class Task03Main {
     public static void main(String[] args) {
-
+    ComplexNum a = new ComplexNum(3, 2);
+    ComplexNum b = new ComplexNum(1, 7);
+    ComplexNum c = ComplexNum.add(a, b);
+    System.out.println("Sum:\n" + a + " + " + b + " = " + c);
+    c = ComplexNum.multiply(a, b);
+    System.out.println("Multiply:\n(" + a + ") * (" + b + ") = " + c);
     }
 }

task04/src/com/example/task04/Line.java

@@ -0,0 +1,32 @@
+package com.example.task04;
+
+public class Line {
+    private final Point p1;
+    private final Point p2;
+
+    public Line(Point p1, Point p2) {
+        this.p1 = p1;
+        this.p2 = p2;
+    }
+
+    public Point getP1() {
+        return p1;
+    }
+
+    public Point getP2() {
+        return p2;
+    }
+
+    public boolean isCollinearLine(Point p) {
+        // Проверяем, если три точки (p1, p2 и p) коллинеарны, используя определитель матрицы
+        double determinant = (p2.getX() - p1.getX()) * (p.getY() - p1.getY()) - (p2.getY() - p1.getY()) * (p.getX() - p1.getX());
+
+        // Если определитель равен 0, значит, точки коллинеарны
+        return Math.abs(determinant) < 1e-9;  //  учёт погрешности
+    }
+
+    public String toString() {
+        return String.format("Отрезок от %s до %s", p1.toString(), p2.toString());
+    }
+}
+

task04/src/com/example/task04/Point.java

@@ -0,0 +1,22 @@
+package com.example.task04;
+
+public class Point {
+    private final double x;
+    private final double y;
+
+    public Point(double x, double y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public double getX() {
+        return x;
+    }
+    public double getY() {
+        return y;
+    }
+
+    public String toString() {
+        return String.format("(%.2f, %.2f)", x, y);
+    }
+}

task04/src/com/example/task04/Task04Main.java

@@ -2,6 +2,15 @@
 
 public class Task04Main {
     public static void main(String[] args) {
+        Point p1 = new Point(0, 0);
+        Point p2 = new Point(4, 4);
+        Point p3 = new Point(2, 2);
 
+        Line line = new Line(p1, p2);
+
+        boolean isCollinear = line.isCollinearLine(p3);
+
+        System.out.println(line);
+        System.out.println("Точка " + p3 + " лежит на линии: " + isCollinear);
     }
 }

task05/src/com/example/task05/Point.java

@@ -4,25 +4,29 @@
  * Точка в двумерном пространстве
  */
 public class Point {
+    private final double x;  // Координата X
+    private final double y;  // Координата Y
 
     /**
      * Конструктор, инициализирующий координаты точки
      *
      * @param x координата по оси абсцисс
      * @param y координата по оси ординат
      */
+
     public Point(double x, double y) {
-        throw new AssertionError();
+        this.x = x;
+        this.y = y;
     }
 
     /**
      * Возвращает координату точки по оси абсцисс
      *
      * @return координату точки по оси X
      */
+
     public double getX() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return x;
     }
 
     /**
@@ -31,8 +35,7 @@ public double getX() {
      * @return координату точки по оси Y
      */
     public double getY() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return y;
     }
 
     /**
@@ -42,8 +45,11 @@ public double getY() {
      * @return расстояние от текущей точки до переданной
      */
     public double getLength(Point point) {
-        // TODO: реализовать
-        throw new AssertionError();
+        return Math.sqrt(Math.pow(point.getX() - this.x, 2) + Math.pow(point.getY() - this.y, 2));
+    }
+
+    public String toString() {
+        return String.format("(%.2f, %.2f)", x, y);
     }
 
 }