Первое задание по Джава

Task2_and_Task3/Java task.java

@@ -0,0 +1,72 @@
+class Product{
+
+    String name;
+    double price;
+
+    Product(String n, double p){
+        name = n;
+        price = p;
+    }
+    String getName(){
+        return name;
+    }
+    double getPrice(){
+        return price;
+    }
+}
+import java.util.ArrayList;
+
+class Cart{
+
+    ArrayList<Product> list;
+
+    Cart(){
+        list = new ArrayList<Product>();
+    }
+
+    void add(Product pr){
+        list.add(pr);
+    }
+
+    void del(String name){
+        for (int i = 0; i < list.size(); i++){
+            if (list.get(i).getName().equals(name)){
+                list.remove(i);
+                return;
+            }
+        }
+    }
+    double sum(){
+        double s = 0;
+        for (int i = 0; i < list.size(); i++){
+            s = s + list.get(i).getPrice();
+        }
+        return s;
+    }
+
+    void show() {
+        System.out.println("Ваша корзина:");
+        for (int i = 0; i < list.size(); i++){
+            System.out.println(list.get(i).getName() + " " + list.get(i).getPrice());
+        }
+        System.out.println("Сумма выбранных товаров = " + sum());
+    }
+}
+
+public class Main{
+    public static void main(String[] args){
+
+        Product a = new Product("Яблоко", 15);
+        Product b = new Product("Банан", 24);
+        Product c = new Product("Як", 1500000);
+        Cart k = new Cart();
+        k.add(a);
+        k.add(b);
+        k.add(c);
+        k.show();
+        k.del("Яблоко");
+        k.show();
+    }
+}
+
+

Task2_and_Task3/Task2.java

@@ -0,0 +1,68 @@
+    class Rectangle{
+        double width;
+        double height;
+
+        Rectangle(double w, double h){
+            if (w <= 0 || h <= 0){
+                throw new RuntimeException("Введены неправильнык параметры фигуры");
+            }
+            width = w;
+            height = h;
+        }
+
+        double S(){
+            return width * height;
+        }
+
+        double P(){
+            return 2 * (width + height);
+        }
+    }
+    class Triangle{
+        double gip;
+        double kat1;
+        double kat2;
+
+        Triangle(double a, double b, double c){
+            if (a <= 0 || b <= 0 || c <= 0 || a + b <= c || a + c <= b || b + c <= a){
+                throw new RuntimeException("Введены неправильные параметыр фигуры");
+            }
+            gip = a;
+            kat1 = b;
+            kat2 = c;
+        }
+
+        double P(){
+            return gip + kat1 + kat2;
+        }
+
+        double S(){
+            double p = P() / 2;
+            return Math.sqrt(p * (p - gip) * (p - kat1) * (p - kat2));
+        }
+    }
+    class Circle{
+        double radius;
+
+        Circle(double r){
+            if (r <= 0){
+                throw new RuntimeException("Введены неправильнык параметры");
+            }
+            radius = r;
+        }
+
+        double S(){
+            return 3.14 * radius * radius;
+        }
+
+        double P(){
+            return 2 * 3.14 * radius;
+        }
+    }
+    public class Main {
+        public static void main(String[] args) {
+            Rectangle R = new Rectangle(4, 5);
+            System.out.println("Rectangle area: " + R.S());
+            System.out.println("Rectangle perimeter: " + R.P());
+        }
+    }

Task2_and_Task3/Task2_and_Task3.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

Task2_and_Task3/Task3.java

@@ -0,0 +1,53 @@
+class korobkastrok {
+
+    private String[] stroki;
+    private int count;
+    private int totalLength;
+
+    korobkastrok(int amount) {
+        stroki = new String[amount];
+        count = 0;
+        totalLength = 0;
+    }
+    void add(String string) {
+        if (count == stroki.length) {
+            throw new RuntimeException("Коробка строк заполнена");
+        }
+        int cor = count;
+        for (int i = count - 1; i >= 0; i--) {
+            if (stroki[i].length() > string.length()) {
+                stroki[i + 1] = stroki[i];
+                cor = i;
+            } else {
+                break;
+            }
+        }
+        stroki[cor] = string;
+        count++;
+        totalLength += string.length();
+    }
+
+    String maxLength() {
+        if (count == 0) {
+            return null;
+        }
+        return stroki[count - 1];
+    }
+
+    double avgLength() {
+        if (count == 0) {
+            return 0;
+        }
+        return (double) totalLength / count;
+    }
+}
+
+
+
+//korobkastrok m = new korobkastrok(5);
+//m.add("Яблоко");
+//m.add("Банан");
+//m.add("Як");
+//
+//System.out.println(m.maxLength());
+//System.out.println(m.avgLength());

first-project/src/main/java/org/example/Main.java

@@ -1,33 +1,15 @@
-package org.example;
+public class MaxOf3Num {
+    int a;
+    int b;
+    int c;
 
-public class Main {
-    public static void main(String[] args) {
-        int a = -1;
-        int b = 2;
-        double d = 2.2;
-        float f = 2.2f;
-        String s = "just-string";
-        boolean l = true;
-//        System.out.println(a + b);
+    void findMax (int a, int b, int c) {
 
-//        if (a > 0) {
-//            System.out.println(a);
-//        }else{
-//            System.out.println("a<=0");
-//        }
-//        int i = 0;
-//        while(i < 10){
-//            System.out.println(i);
-//            i++;
-//        }
+        if (a > b && a > c) {
+            System.out.println( a);
+        } else if (b > c) {
+            System.out.println( b);
 
-        Human human = new Human(30, 180);
-        Human human1 = new Human(29, 179);
-        Human baby1 = new Human(55);
-
-
-        System.out.println(baby1.olderThan18());
-        System.out.println(human.getAge());
-
-    }
-}
+        } else {
+            System.out.println( c);
+        }

first-project/src/main/java/org/example/Max_of_four.java

@@ -0,0 +1,15 @@
+package org.example;
+
+public class Main {
+    static void main() {
+           int[] arr = {1, 5, 3, 9, 2};
+           int max = arr[0];
+           for (int i = 1; i < arr.length; i++) {
+               if (arr[i] > max) {
+                   max = arr[i];
+               }
+           }
+           System.out.println(max);
+           }
+    }
+}

first-project/src/main/java/org/org.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" packagePrefix="org" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>