Воронин Глеб. Модуль 04

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

@@ -7,8 +7,34 @@ public class Point {
     int x;
     int y;
 
+    public Point() {
+        this.x = 0;
+        this.y = 0;
+    }
+
+    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) {
+        int dx = this.x - point.x;
+        int dy = this.y - point.y;
+        return Math.sqrt(dx * dx + dy * dy);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("(%d, %d)", x, y);
+    }
+
     void print() {
-        String pointToString = String.format("(%d, %d)", x, y);
-        System.out.println(pointToString);
+        System.out.println(toString());
     }
-}
+}

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

@@ -0,0 +1,69 @@
+package com.example.task02;
+
+public class TimeSpan {
+    private int hours;
+    private int minutes;
+    private int seconds;
+
+    public TimeSpan(int hours, int minutes, int seconds) {
+        setTime(hours, minutes, seconds);
+    }
+
+    private void setTime(int hours, int minutes, int seconds) {
+        long totalSeconds = hours * 3600L + minutes * 60L + seconds;
+
+        if (totalSeconds < 0) {
+            totalSeconds = 0;
+        }
+
+        this.hours = (int) (totalSeconds / 3600);
+        totalSeconds %= 3600;
+        this.minutes = (int) (totalSeconds / 60);
+        this.seconds = (int) (totalSeconds % 60);
+    }
+
+    public int getHours() {
+        return hours;
+    }
+
+    public void setHours(int hours) {
+        setTime(hours, this.minutes, this.seconds);
+    }
+
+    public int getMinutes() {
+        return minutes;
+    }
+
+    public void setMinutes(int minutes) {
+        setTime(this.hours, minutes, this.seconds);
+    }
+
+    public int getSeconds() {
+        return seconds;
+    }
+
+    public void setSeconds(int seconds) {
+        setTime(this.hours, this.minutes, seconds);
+    }
+
+    public void add(TimeSpan time) {
+        setTime(
+                this.hours + time.hours,
+                this.minutes + time.minutes,
+                this.seconds + time.seconds
+        );
+    }
+
+    public void subtract(TimeSpan time) {
+        long thisTotal = this.hours * 3600L + this.minutes * 60L + this.seconds;
+        long otherTotal = time.hours * 3600L + time.minutes * 60L + time.seconds;
+        long resultTotal = thisTotal - otherTotal;
+
+        setTime(0, 0, (int)resultTotal);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%02d:%02d:%02d", hours, minutes, seconds);
+    }
+}

task03/src/com/example/task03/ComplexNumber.java

@@ -0,0 +1,33 @@
+package com.example.task03;
+
+public class ComplexNumber {
+    private final double real;
+    private final double imaginary;
+
+    public ComplexNumber(double real, double imaginary) {
+        this.real = real;
+        this.imaginary = imaginary;
+    }
+
+    public ComplexNumber add(ComplexNumber other) {
+        return new ComplexNumber(
+                this.real + other.real,
+                this.imaginary + other.imaginary
+        );
+    }
+
+    public ComplexNumber multiply(ComplexNumber other) {
+        double newReal = this.real * other.real - this.imaginary * other.imaginary;
+        double newImaginary = this.real * other.imaginary + this.imaginary * other.real;
+        return new ComplexNumber(newReal, newImaginary);
+    }
+
+    @Override
+    public String toString() {
+        if (imaginary >= 0) {
+            return String.format("%.2f + %.2fi", real, imaginary);
+        } else {
+            return String.format("%.2f - %.2fi", real, Math.abs(imaginary));
+        }
+    }
+}

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) {
+        int determinant = p1.getX() * (p2.getY() - p.getY()) +
+                p2.getX() * (p.getY() - p1.getY()) +
+                p.getX() * (p1.getY() - p2.getY());
+
+        return determinant == 0;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Line[%s, %s]", p1, p2);
+    }
+}

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

@@ -0,0 +1,24 @@
+package com.example.task04;
+
+public class Point {
+    private final int x;
+    private final int y;
+
+    public Point(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("(%d, %d)", 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);
+        Point p4 = new Point(1, 2);
 
+        Line line = new Line(p1, p2);
+
+        System.out.println("Line: " + line);
+        System.out.println("Point p3 " + p3 + " is collinear: " + line.isCollinearLine(p3));
+        System.out.println("Point p4 " + p4 + " is collinear: " + line.isCollinearLine(p4));
     }
-}
+}

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

@@ -4,6 +4,8 @@
  * Точка в двумерном пространстве
  */
 public class Point {
+    private final double x;
+    private final double y;
 
     /**
      * Конструктор, инициализирующий координаты точки
@@ -12,7 +14,8 @@ public class Point {
      * @param y координата по оси ординат
      */
     public Point(double x, double y) {
-        throw new AssertionError();
+        this.x = x;
+        this.y = y;
     }
 
     /**
@@ -21,8 +24,7 @@ public Point(double x, double y) {
      * @return координату точки по оси X
      */
     public double getX() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return x;
     }
 
     /**
@@ -31,8 +33,7 @@ public double getX() {
      * @return координату точки по оси Y
      */
     public double getY() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return y;
     }
 
     /**
@@ -42,8 +43,8 @@ public double getY() {
      * @return расстояние от текущей точки до переданной
      */
     public double getLength(Point point) {
-        // TODO: реализовать
-        throw new AssertionError();
+        double dx = this.x - point.x;
+        double dy = this.y - point.y;
+        return Math.sqrt(dx * dx + dy * dy);
     }
-
-}
+}

task05/src/com/example/task05/PolygonalLine.java

@@ -1,17 +1,25 @@
 package com.example.task05;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Ломаная линия
  */
 public class PolygonalLine {
+    private List<Point> points = new ArrayList<>();
 
     /**
      * Устанавливает точки ломаной линии
      *
      * @param points массив точек, которыми нужно проинициализировать ломаную линию
      */
     public void setPoints(Point[] points) {
-        // TODO: реализовать
+        this.points = new ArrayList<>();
+        for (Point point : points) {
+            // Создаем копию каждой точки
+            addPoint(point.getX(), point.getY());
+        }
     }
 
     /**
@@ -20,7 +28,8 @@ public void setPoints(Point[] points) {
      * @param point точка, которую нужно добавить к ломаной
      */
     public void addPoint(Point point) {
-        // TODO: реализовать
+        // Создаем новую точку вместо использования переданной
+        addPoint(point.getX(), point.getY());
     }
 
     /**
@@ -30,7 +39,7 @@ public void addPoint(Point point) {
      * @param y координата по оси ординат
      */
     public void addPoint(double x, double y) {
-        // TODO: реализовать
+        points.add(new Point(x, y));
     }
 
     /**
@@ -39,8 +48,10 @@ public void addPoint(double x, double y) {
      * @return длину ломаной линии
      */
     public double getLength() {
-        // TODO: реализовать
-        throw new AssertionError();
+        double length = 0;
+        for (int i = 0; i < points.size() - 1; i++) {
+            length += points.get(i).getLength(points.get(i + 1));
+        }
+        return length;
     }
-
-}
+}

task05/src/com/example/task05/Task05Main.java

@@ -2,6 +2,20 @@
 
 public class Task05Main {
     public static void main(String[] args) {
+        PolygonalLine line = new PolygonalLine();
 
+        line.addPoint(new Point(1, 2));
+        line.addPoint(4, 6);
+        line.addPoint(new Point(8, 9));
+
+        System.out.println("Длина ломаной: " + line.getLength());
+
+        Point[] points = {
+                new Point(0, 0),
+                new Point(3, 4),
+                new Point(6, 8)
+        };
+        line.setPoints(points);
+        System.out.println("Новая длина ломаной: " + line.getLength());
     }
-}
+}