Feature/review

java/pro/sky/java/course1/homework6/Main.java

@@ -0,0 +1,126 @@
+package pro.sky.java.course1.homework6;
+
+import java.time.LocalDate;
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class Main {
+    public static void checkYear(int year) {
+        if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
+            System.out.printf("%d is a leap year\n", year);
+        } else {
+            System.out.printf("%d is not a leap year\n", year);
+        }
+    }
+
+    public static void checkOS(int deviceYear, int clientOS) {
+        int currentYear = LocalDate.now().getYear();
+        if (clientOS == 1) {
+            if (deviceYear < currentYear) {
+                System.out.println("Install the lite-version for iOS at the link");
+            } else if (deviceYear == currentYear) {
+                System.out.println("Install the full-version for iOS at the link");
+            } else {
+                System.out.println("Incorrect input!");
+            }
+        } else if (clientOS == 0) {
+            if (deviceYear < currentYear) {
+                System.out.println("Install the lite-version for Android at the link");
+            } else if (deviceYear == currentYear) {
+                System.out.println("Install the full-version for Android at the link");
+            } else {
+                System.out.println("Incorrect input!");
+            }
+        } else {
+            System.out.println("Incorrect input!");
+        }
+    }
+
+    public static int calcDeliveryTime(int deliveryDistance) {
+        int deliveryTime = 1;
+        if (deliveryDistance > 20) {
+            deliveryTime++;
+        }
+        if (deliveryDistance > 60) {
+            deliveryTime++;
+        }
+        if (deliveryDistance <= 0) {
+            System.out.println("Incorrect input!");
+            return 0;
+        }
+        return deliveryTime;
+    }
+
+    public static void checkDoubles(String str) {
+        for (int i = 0; i < str.length() - 1; i++) {
+            if (str.charAt(i) == str.charAt(i + 1)) {
+                System.out.printf("Duplicate character '%c' found.\n", str.charAt(i));
+                return;
+            }
+        }
+        System.out.println("Duplicate characters not found.");
+    }
+
+    public static void reverseArrayOrder(int[] arr) {
+        for (int i = 0; i < arr.length / 2; i++) {
+            int t = arr[i];
+            arr[i] = arr[arr.length - i - 1];
+            arr[arr.length - i - 1] = t;
+        }
+    }
+
+    public static int[] generateRandomArray() {
+        java.util.Random random = new java.util.Random();
+        int[] arr = new int[30];
+        for (int i = 0; i < arr.length; i++) {
+            arr[i] = random.nextInt(100_000) + 100_000;
+        }
+        return arr;
+    }
+
+    public static double getAverage(int[] arr) {
+        double sum = getSum(arr);
+        double averageValue = sum / arr.length;
+        return averageValue;
+    }
+
+    public static double getSum(int[] arr) {
+        int sum = 0;
+        for (int i = 0; i < arr.length; i++) {
+            sum += arr[i];
+        }
+        return sum;
+    }
+
+
+    public static void main(String[] args) {
+        //task1
+        Scanner input = new Scanner(System.in);
+        System.out.print("Enter the year: ");
+        int y = input.nextInt();
+        checkYear(y);
+        //task2
+        System.out.print("Enter the year of manufacture of the device: ");
+        int deviceYear = input.nextInt();
+        System.out.print("Enter 0 if you have Android OS or 1 if iOS: ");
+        int deviceOS = input.nextInt();
+        checkOS(deviceYear, deviceOS);
+        //task3
+        System.out.print("Enter the distance: ");
+        int dist = input.nextInt();
+        System.out.printf("Delivery will take %d days.\n", calcDeliveryTime(dist));
+        //task4
+        System.out.print("Enter some line: ");
+        String s = input.next();
+        checkDoubles(s);
+        input.close();
+        //task5
+        int[] array = {7, 4, 5, 8, 1};
+        reverseArrayOrder(array);
+        System.out.println("The reversed array looks like this: " + Arrays.toString(array));
+        //task6
+        int[] arr = generateRandomArray();
+        double averageArr = getAverage(arr);
+        System.out.printf("The average expenditure was %.2f rubles. \n", averageArr);
+    }
+}