ulearn-me-course-java · Bichanskiy · Oct 10, 2025
diff --git a/task01/src/com/example/task01/Point.java b/task01/src/com/example/task01/Point.java
@@ -1,14 +1,35 @@
+
 package com.example.task01;
 
+import static java.lang.Math.*;
+
 /**
  * Класс точки на плоскости
  */
 public class Point {
-    int x;
-    int y;
+    public int x;
+    public int y;
+    public Point(int x, int y){
+        this.x = x;
+        this.y = y;
+    }
+
+    public Point(){}
+
+    public void flip(){
+        x *= -1;
+        y *= -1;
+        int temp = y;
+        y = x;
+        x = temp;
+    }
+
+    public double distance(Point point){
+        double result = sqrt(abs(((double) this.x - point.x) * ((double) this.x - point.x) + ((double) this.y - point.y) * ((double) this.y - point.y)));
+        return result;
+    }
 
-    void print() {
-        String pointToString = String.format("(%d, %d)", x, y);
-        System.out.println(pointToString);
+    public String toString(){
+        return String.format("(%d, %d)", String.valueOf(x), String.valueOf(y));
     }
 }
diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java
@@ -2,18 +2,5 @@
 
 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;
-
-        System.out.println("Point 1:");
-        p1.print();
-        System.out.println(p1);
-        System.out.println("Point 2:");
-        p2.print();
-        System.out.println(p2);
     }
 }
diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java
@@ -2,6 +2,109 @@
 
 public class Task02Main {
     public static void main(String[] args) {
+        TimeSpan time1 = new TimeSpan(20, 10, 2);
+        TimeSpan time2 = new TimeSpan(40, 60, 3);
+        time1.add(time2);
+    }
+}
+
+class TimeSpan{
+   private int second;
+   private int minute;
+   private int hours;
+
+   public TimeSpan(int second, int minute, int hours){
+       this.second = second;
+       this.minute = minute;
+       this.hours = hours;
+       checkSecond();
+       checkMinute();
+
+   }
 
+   private void checkSecond(){
+       if (second >= 60){
+           while (second >= 60){
+               minute++;
+               second -= 60;
+           }
+       }
+   }
+
+    private void checkMinute(){
+        if (minute >= 60){
+            while (minute >= 60){
+                hours++;
+                minute -= 60;
+            }
+        }
     }
+
+   public int getSecond(){
+       return second;
+   }
+
+   public void setSecond(int second){
+       this.second = second;
+   }
+
+   public int getMinute(){
+       return minute;
+   }
+
+   public void setMinute(int minute){
+       this.minute = minute;
+   }
+
+   public int getHours(){
+       return hours;
+   }
+
+   public void setHours(int hours){
+       this.hours = hours;
+   }
+
+   public void add(TimeSpan time){
+       hours += time.getHours();
+       minute += time.getMinute();
+       second += time.getSecond();
+
+       checkSecond();
+       checkMinute();
+   }
+
+   public void subtract(TimeSpan time){
+       if (second < time.getSecond()){
+           while (second >= time.getSecond()){
+               if(minute != 0){
+                   minute--;
+                   second += 60;
+               }
+               else System.out.println("Больше минут нет");
+           }
+       }
+       second -= time.getSecond();
+
+       if (minute < time.getMinute()){
+           while (minute >= time.getMinute()){
+               if(hours != 0){
+                   hours--;
+                   minute += 60;
+               }
+               else System.out.println("Больше часов нет");
+
+           }
+       }
+
+       if (hours >= time.getHours()){
+           hours -= time.getHours();
+       }
+       else{
+           System.out.println("Часы невозможно вычислить");
+       }
+   }
+
+   public String toString(){
+       return String.format("Часы: %d, минуты: %d, секунды: %d", hours, minute, second);
+   }
 }
diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java
@@ -1,7 +1,45 @@
 package com.example.task03;
 
+import java.io.PrintStream;
+
 public class Task03Main {
     public static void main(String[] args) {
+        complexNumber c1 = new complexNumber(3, 2);
+        complexNumber c2 = new complexNumber(1, 4);
+
+        complexNumber resultOfSum = c1.sumOfComplex(c2);
+        complexNumber resultOfComposition = c1.compositionOfComplex(c2);
+
+        System.out.println(resultOfSum.toString());
+        System.out.println(resultOfComposition.toString());
+    }
+}
+
+class complexNumber{
+    public double real;
+    public double imaginary;
+
 
+    public complexNumber(double real, double imaginary){
+        this.real = real;
+        this.imaginary = imaginary;
     }
+
+    public complexNumber sumOfComplex(complexNumber c){
+        complexNumber result = new complexNumber((real + c.real), (imaginary + c.imaginary));
+        return result;
+    }
+    // Суть в том, что при умножении мнимая единица i^2
+    public complexNumber compositionOfComplex(complexNumber c){
+        double realPart = real * c.real - imaginary * c.imaginary;
+        double imaginaryPart = real * c.imaginary + imaginary * c.real;
+
+        complexNumber result = new complexNumber(realPart, imaginaryPart);
+        return result;
+    }
+
+    public String toString(){
+        return String.format("%f + %f i", real, imaginary);
+    }
+
 }
diff --git a/task04/src/com/example/task04/Task04Main.java b/task04/src/com/example/task04/Task04Main.java
@@ -5,3 +5,64 @@ public static void main(String[] args) {
 
     }
 }
+
+class Line{
+    private Point firstPoint;
+    private Point secondPoint;
+
+    public Line(Point p1, Point p2){
+        firstPoint = p1;
+        secondPoint = p2;
+    }
+
+    public Point getP1(){
+        return firstPoint;
+    }
+
+    public Point getP2(){
+        return secondPoint;
+    }
+
+    public boolean isCollinearLine(Point p){
+            int x1 = firstPoint.getX();
+            int y1 = firstPoint.getY();
+            int x2 = secondPoint.getX();
+            int y2 = secondPoint.getY();
+            int x3 = p.getX();
+            int y3 = p.getY();
+
+            // Формула площади треугольника через координаты
+            // Если площадь = 0, точки лежат на одной прямой
+            int area = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);
+
+            return area == 0;
+
+    }
+
+    public String toString(){
+        return String.format("Первая точка: %s вторая точка %s", firstPoint.toString(), secondPoint.toString());
+    }
+}
+
+class Point{
+    private final int x;
+    private final int y;
+
+    public Point(int x, int y){
+        this.x = x;
+        this.y = y;
+    }
+
+    public String toString(){
+        return String.format("%d, %d", x, y);
+    }
+
+    public int getX(){
+        return x;
+    }
+
+    public int getY(){
+        return y;
+    }
+
+}
diff --git a/task05/src/com/example/task05/Point.java b/task05/src/com/example/task05/Point.java
@@ -1,5 +1,8 @@
 package com.example.task05;
 
+import static java.lang.Math.abs;
+import static java.lang.Math.sqrt;
+
 /**
  * Точка в двумерном пространстве
  */
@@ -11,8 +14,11 @@ public class Point {
      * @param x координата по оси абсцисс
      * @param y координата по оси ординат
      */
+    private final double x;
+    private final double y;
     public Point(double x, double y) {
-        throw new AssertionError();
+        this.x = x;
+        this.y = y;
     }
 
     /**
@@ -21,8 +27,8 @@ public Point(double x, double y) {
      * @return координату точки по оси X
      */
     public double getX() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return x;
+        // throw new AssertionError();
     }
 
     /**
@@ -31,8 +37,8 @@ public double getX() {
      * @return координату точки по оси Y
      */
     public double getY() {
-        // TODO: реализовать
-        throw new AssertionError();
+        return y;
+        // throw new AssertionError();
     }
 
     /**
@@ -42,8 +48,9 @@ public double getY() {
      * @return расстояние от текущей точки до переданной
      */
     public double getLength(Point point) {
-        // TODO: реализовать
-        throw new AssertionError();
+        double result = sqrt(((point.getX() - x) * (point.getX() - x)) + ((point.getY() - y) * (point.getY() - y)));
+        return result;
+        // throw new AssertionError();
     }
 
 }