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8 Commits

Author SHA1 Message Date
kxtzzl 1f0c160216 Update lab4 2023-04-06 00:22:53 +03:00
kxtzzl 511422ad6c Update lab2 2023-04-05 12:30:01 +03:00
kxtzzl 4f86e8cf76 Update lab4 2023-04-03 10:56:11 +03:00
kxtzzl 9493c4974d Create lab4 2023-03-24 04:45:23 +02:00
romchhh 66089802cc Create lab3 2023-03-24 01:42:33 +02:00
romchhh bbb463871e Create lab2 2023-03-20 20:50:22 +02:00
romchhh a7a259d3c6 Create lab1 fedoniuk 2023-02-26 14:47:36 +02:00
Oleksii Aleshchenko 8b6da131a0 add inheritance example 2023-02-23 16:03:51 +02:00
31 changed files with 492 additions and 558 deletions
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# Project exclude paths
/out/
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# Default ignored files
/shelf/
/workspace.xml
# Editor-based HTTP Client requests
/httpRequests/
# Datasource local storage ignored files
/dataSources/
/dataSources.local.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
<output url="file://$PROJECT_DIR$/out" />
</component>
</project>
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/OOP_IO-2x_2023.iml" filepath="$PROJECT_DIR$/OOP_IO-2x_2023.iml" />
</modules>
</component>
</project>
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Generated
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
</component>
</project>
-40
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using System;
public class Laba2
{
public static void Main(string[] args)
{
const int a = 2;
int[,] b = new[,] //створення матриці;
{
{ 1, 2, 8 },
{ 3, 4, 5 },
{ 6, 7, 9 }
};
int rows = b.GetLength(0); //отримання довжини рядків
int cols = b.GetLength(1); //отримання довжини стовпців
for (int i = 0; i < rows; i++)
{
int Avg = 0;
for (int j = 0; j < cols; j++)
{
Console.Write(b[i, j] + " "); // перебір матриці для обчислення середнього значення рядка
Avg += b[i, j];
}
Avg = Avg / cols;
Console.Write($"-average of row is:{Avg};" );
Console.WriteLine(" ");
}
Console.WriteLine(" ");
for (int x = 0; x < rows; x++)
{
for (int y = 0; y < cols; y++)
{
Console.Write(b[x, y] * a + " "); //виведення матриці, помноженої на константу
}
Console.WriteLine(" ");
}
}
}
-33
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using System;
using System.Collections.Generic;
class Lab3
{
public static void Main(string[] args)
{
string text = "Вухатий великий синiй слон. Яблуко в саду. Зелене яблуко? Груша. Жовта слива висить у саду!";
Console.WriteLine(text );
// розділяємо текст на окремі речення
string[] textSplit = text.Split(new[] { '.', '?', '!' }, StringSplitOptions.RemoveEmptyEntries);
// обчислюємо кількість слів у кожному реченні та створюємо масив з кількістю слів у реченнях
int[] amountOfWords = new int[textSplit.Length];
for (int i = 0; i < textSplit.Length; i++)
{
string[] words = textSplit[i].Trim().Split(' ', StringSplitOptions.RemoveEmptyEntries);
amountOfWords[i] = words.Length;
}
// створюємо Dictionary, де ключ - кількість слів у реченні, а значення - речення
Dictionary<string, int> sentenceDictionary = new Dictionary<string, int>();
for (int i = 0; i < textSplit.Length; i++)
{
sentenceDictionary.Add(textSplit[i],amountOfWords[i] );
}
var sortedDict = sentenceDictionary.OrderBy(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
Console.WriteLine(String.Join(";", sortedDict.Keys));
}
}
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Furniture
{
// 5 полів
private string type;
private string material;
private string color;
private int price;
private int amount;
// конструктор з атрибутами
public Furniture(string type, string material, string color, int price, int amount)
{
this.type = type;
this.material = material;
this.color = color;
this.price = price;
this.amount = amount;
}
// методи для повернення атрибутів
public string getType()
{
return type;
}
public string getMaterial()
{
return material;
}
public string getColor()
{
return color;
}
public int getPrice()
{
return price;
}
public int getAmount()
{
return amount;
}
public static void Main(string[] args)
{
Furniture[] furnitureArr = {
new Furniture("шафа", "дерево", "коричневий", 5000, 2),
new Furniture("стiл", "скло", "чорний", 3000, 3),
new Furniture("лiжко", "метал", "срiблястий", 8000, 1),
new Furniture("диван", "тканина", "сiрий", 10000, 2),
new Furniture("стiлець", "метал", "синій", 500, 4)
};
// Сортування масиву за ціною за зростанням
var sorted = furnitureArr.OrderBy(ob => ob.price).ToArray();
// Вивести відсортований масив
Console.WriteLine("Вiдсортований за цiною (за зростанням):");
foreach (Furniture f in sorted)
{
Console.WriteLine(f.getType() + " - " + f.getPrice() + " грн;");
}
Console.WriteLine(' ');
// Сортування масиву за кількістю за спаданням
var sortedReversery = furnitureArr.OrderBy(ob => ob.amount).ToArray().Reverse();
// Вивести відсортований масив
Console.WriteLine("Вiдсортований за кiлькiстю (за спаданням):");
foreach (Furniture f in sortedReversery)
{
Console.Write($"{f.getType()} - {f.getAmount()}; " );
}
Console.WriteLine(' ');
}
}
}
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Formats.Asn1;
// Визначити ієрархію рухомого складу залізничного транспорту.Створити пасажирський потяг.Порахувати загальну чисельність пасажирів і багажу в потязі.
// Провести сортування вагонів потягу за рівнем комфортності. Знайти вагон в потязі, що відповідає заданому діапазону кількості пасажирів.
class Lab6
{
public static void Main(string[] args)
{
List<Wagons> wagons = new List<Wagons>(); //створюємо лист-список вагонів;
// Додаємо вагони за допомогою класу Wagons;
wagons.Add(new Wagons.PassengerWagons("Пасажирський", 100, 100, "Вищий", 10));
wagons.Add(new Wagons.PassengerWagons("Пасажирський", 50, 48, "Середнiй", 20));
wagons.Add(new Wagons.PassengerWagons("Пасажирський", 20, 15, "Низький", 30));
wagons.Add(new Wagons.FreightWagons("Вантажний", 10, 10));
wagons.Add(new Wagons.FreightWagons("Вантажний", 20, 20));
wagons.Add(new Wagons.FreightWagons("Вантажний", 30, 30));
Console.WriteLine("Усi вагони:"); //відображення всіх вагонів;
foreach (Wagons wagon in wagons)
{
Console.WriteLine(wagon.GetType() + ": " + wagon.GetPassengers() + " пасажирiв(-а), " + wagon.GetBaggage() +
" валiз/контейнерiв, " + wagon.GetComfort() + ", " + wagon.GetAmount() + ";");
}
int amountOfPassangers = 0; //обчислення загальної кількості пасажирів;
foreach (Wagons p in wagons)
{
amountOfPassangers += p.GetPassengers();
}
var sorted = wagons.OrderByDescending(ob => ob.GetComfort()).ToArray(); //сортування вагонів за рівнем комфорту;
Console.WriteLine("\nКiлькiсть пасажирiв у пасажирському вагонi: " + amountOfPassangers + ";");
Console.WriteLine("\nВеддiть мiнiмальну кiлькiсть пасажирiв: ");
var minPassangers = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Веддiть максимальну кiлькiсть пасажирiв: ");
var maxPassangers = Convert.ToInt32(Console.ReadLine());
foreach (Wagons t in wagons)
{
if (t.GetPassengers() != null && t.GetPassengers() >= minPassangers && t.GetPassengers() <= maxPassangers) //пошук вагону за кількістю пасажирів;
{
Console.Write(t.GetType() + " - " + t.GetPassengers()+"; ");
}
else
{
throw (new InvalidOperationException("Немає такого вагону;"));
}
}
}
class Wagons
{
private string type; // тип вагону
private int passengers; // кількість пасажирів
private int baggage; // кількість багажу в тоннах
private string comfort; // рейтиг комфорту вагону
private int amount; // кількість вагонів
public Wagons(string type, int? passengers, int? baggage, string comfort, int amount) //конструктор вагонів;
{
this.type = type;
this.passengers = Convert.ToInt32(passengers);
this.baggage = Convert.ToInt32(baggage);
this.comfort = comfort;
this.amount = amount;
}
public string GetType() //геттери атрибутів класу;
{
return type;
}
public int GetPassengers()
{
return passengers;
}
public int? GetBaggage()
{
return baggage;
}
public string GetComfort()
{
return comfort;
}
public int GetAmount()
{
return amount;
}
// підклас Пасажирський вагон який наслідує батьківський клас Вагони;
public class PassengerWagons : Wagons
{
public PassengerWagons(string type, int passengers, int baggage, string comfort, int amount) : base(type,
passengers, baggage, comfort, amount)
{
}
}
// підклас Вантажний вагон який наслідує батьківський клас Вагони;
public class FreightWagons : Wagons
{
public FreightWagons(string type, int baggage, int amount) : base(type, null, baggage, null, amount)
{
}
}
}
}
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<?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://$MODULE_DIR$/src" isTestSource="false" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>
-1
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Files with lab2,3,4 located in in Lab3. My excuses for confusing you
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import java.util.Scanner;
public class lab1 {
public static void main(String[] args) {
int C2, C3, C5;
var C7 = 0;
Scanner id = new Scanner(System.in);
System.out.print("Enter the student's ID number: ");
int idbook = id.nextInt();
C2 = idbook % 2;
C3 = idbook % 3;
C5 = idbook % 5;
C7 = idbook % 7;
String[] oper1 = {"+", "-"};
String[] oper2 = {"*", "/", "%", "+", "-"};
String[] oper3 = {"byte", "short", "int", "long", "char", "float", "double"};
int C = C3;
String O1 = oper1[C2];
String O2 = oper2[C5];
String O3 = oper3[C7];
System.out.println("C2 is: " + C2 + ", operation is: " + O1);
System.out.println("C3 = " + C);
System.out.println("C5 is: " + C5 + ", operation is: " + O2);
System.out.println("C7 is: " + C7 + ", Type of indexes i and j is: " + O3);
double i = 0;
double j = 0;
System.out.println("\nEnter a values for lower limits (i and j) in the "+ O3+" type: ");
switch (O3) {
case "byte" -> {
i = id.nextByte();
j = id.nextByte();
}
case "short" -> {
i = id.nextShort();
j = id.nextShort();
}
case "int" -> {
i = id.nextInt();
j = id.nextInt();
}
case "long" -> {
i = id.nextLong();
j = id.nextLong();
}
case "char" -> {
i = id.next().charAt(0);
j = id.next().charAt(0);
}
case "float" -> {
i = id.nextFloat();
j = id.nextFloat();
}
case "double" -> {
i = id.nextDouble();
j = id.nextDouble();
}
}
System.out.println("The value of the created variables is: " + i + " and " + j);
System.out.println("Enter values for top limits (n and m):");
int n, m;
n = id.nextInt();
m = id.nextInt();
double sum = 0, res = 0, res2 = 0;
if ((O1.equals("-") && i + n >= C && i <= C) || i > n || j > m || (C == 0 && i == 0)) {
System.out.println("Incorrect input, try another values");
} else {
for (double a = i; a <= n; a++) {
for (double b = j; b <= m; b++) {
switch (O1) {
case "+" -> res = a + C;
case "-" -> res = a - C;
}
switch (O2) {
case "+" -> res2 = a + b;
case "-" -> res2 = a - b;
case "*" -> res2 = a * b;
case "/" -> res2 = a / b;
case "%" -> res2 = a % b;
}
sum += res2 / res;
}
}
System.out.println("Sum is: " + sum);
}
}
}
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import java.util.Scanner;
import java.util.Random;
public class Lab2 {
public static void main(String[] args) {
int C5, C11, C7;
int idbook = 2430;
C5 = idbook % 5;
C7 = idbook % 7;
C11 = idbook % 11;
System.out.println("C5 = " + C5 + " - Action between matrix is: C=a×B, a - const");
System.out.println("C7 = " + C7 + " - The matrix elements type is: byte");
System.out.println("C11 = " + C11 + " - The action with matrix C is: Find the matrix elements' average value");
Scanner sc = new Scanner(System.in);
System.out.print("\n Enter the number of rows: ");
int rows = sc.nextInt();
System.out.print(" Enter the number of columns: ");
int cols = sc.nextInt();
int min = 0;
int max = 0;
boolean valid = false;
while (!valid) {
System.out.print("\n Enter the minimum value of the matrix numbers (-128 to 127): ");
min = sc.nextInt();
System.out.print(" Enter the maximum value of the matrix numbers (-128 to 127): ");
max = sc.nextInt();
if (min >= -128 && max <= 127 && min < max) {
valid = true;
} else {
System.out.println("\nInvalid input. Please enter the values again.");
}
}
byte[][] matrix = new byte[rows][cols];
Random rand = new Random();
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
matrix[i][j] = (byte) (rand.nextInt(max - min + 1) + min);
}
}
System.out.println("\nThe matrix is:");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
System.out.printf(" %-5d", matrix[i][j]);
}
System.out.println();
}
System.out.print("\nEnter the constant to multiply the matrix by: ");
int constant = sc.nextInt();
byte[][] multipliedMatrix = new byte[rows][cols];
System.out.println(" The matrix multiplied by " + constant + " is:");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
multipliedMatrix[i][j] = (byte) (matrix[i][j] * constant);
System.out.printf(" %-5d", multipliedMatrix[i][j]);
}
System.out.println();
}
System.out.println("\n Press 'enter' to search for the average value of the matrix.");
sc.nextLine();
sc.nextLine();
int sum = 0;
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
sum += multipliedMatrix[i][j];
}
}
double average = (double) sum / (rows * cols);
System.out.println("The average value of the multiplied matrix is: " + average);
}
}
+38
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@@ -0,0 +1,38 @@
import java.util.Scanner;
public class lab3 {
public static void main(String[] args) {
int C17 = 2430 % 17;
System.out.println("\n---------------------------------------------------------------------------------------------------------------------");
System.out.println(" C17 = " + C17 + ", So, the task is: delete all previous occurrences of the last letter of each word of the specified text");
System.out.println("---------------------------------------------------------------------------------------------------------------------");
Scanner scanner = new Scanner(System.in);
String input = null;
while (input == null || input.isEmpty()) {
System.out.print("\nEnter a string: ");
input = scanner.nextLine();
}
try {
StringBuilder sb = new StringBuilder(input);
String[] words = sb.toString().split("\\s+");
for (int i = 0; i < words.length; i++) {
String word = words[i];
char lastLetter = word.charAt(word.length() - 1);
String newWord = "";
for (int j = 0; j < word.length() - 1; j++) {
if (word.charAt(j) != lastLetter) {
newWord += word.charAt(j);
}
}
newWord += lastLetter;
words[i] = newWord;
}
System.out.print("\nFinal string: ");
System.out.println(String.join(" ", words));
} catch (Exception e) {
System.out.println("An error occurred: " + e.getMessage());
}
}
}
+115
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@@ -0,0 +1,115 @@
import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
public class Lab4 {
public static class Student {
private int grBook;
private String name;
private int age;
private double gpa;
private String faculty;
public Student(int grBook, String name, int age, double gpa, String faculty) {
this.grBook = grBook;
this.name = name;
this.age = age;
this.gpa = gpa;
this.faculty = faculty;
}
public int getGrBook() {
return grBook;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public double getGpa() {
return gpa;
}
public String getFaculty() {
return faculty;
}
}
public static void main(String[] args) {
int C11 = 2430 % 11;
System.out.println("\n ----------------------------------------------------------------------------------------------------------");
System.out.println(" C11 = " + C11 + ", So, the task is: Define the student class, which consists of at least 5 fields.");
System.out.println(" ----------------------------------------------------------------------------------------------------------");
Student[] students = {
new Student(1010, "Вікторія", 21, 84.6, "ФІОТ"),
new Student(2010, "Дарія", 20, 79.8, "РТФ"),
new Student(3010, "Анатолій", 19, 94.3, "ХТФ"),
new Student(4040, "Генадій", 22, 62.0, "ІХФ"),
new Student(5050, "Борис", 18, 89.1, "ФММ")
};
Scanner scanner = new Scanner(System.in);
boolean quit = false;
while (!quit) {
System.out.print("\nEnter the field to sort by (greed book, name, age, gpa, faculty) or enter 'quit' to exit: ");
String input = scanner.nextLine();
if (!input.equals("greed book") && !input.equals("name") && !input.equals("age") && !input.equals("gpa") && !input.equals("faculty") && !input.equals("quit")) {
System.out.println("Invalid field to sort by! Please enter 'grBook', 'name', 'age', 'gpa', or 'faculty'.");
continue;
}
if (input.equals("quit")) {
quit = true;
System.out.println("Thank you for using my program:)");
continue;
}
String field = input;
System.out.print("Enter the sort order (asc or desc): ");
String order = scanner.nextLine();
if (!order.equals("asc") && !order.equals("desc")) {
System.out.println("Invalid sort order! Please enter 'asc' or 'desc'.");
continue;
}
Comparator<Student> comparator = null;
switch (field) {
case "greed book":
comparator = Comparator.comparingInt(Student::getGrBook);
break;
case "name":
comparator = Comparator.comparing(Student::getName);
break;
case "age":
comparator = Comparator.comparingInt(Student::getAge);
break;
case "gpa":
comparator = Comparator.comparingDouble(Student::getGpa);
break;
case "faculty":
comparator = Comparator.comparing(Student::getFaculty);
break;
}
if (order.equals("desc")) {
comparator = comparator.reversed();
}
Arrays.sort(students, comparator);
System.out.println("\nSorted by " + field + " (in " + order + "ending order):");
System.out.println(String.format("%n%-15s | %-20s | %-4s | %-4s | %-10s", "Greed book", "Name", "Age", "GPA", " Faculty"));
System.out.println("----------------------------------------------------------------");
for (Student student : students) {
System.out.println(String.format("%-15d | %-20s | %-4d | %-3.1f | %-10s", student.getGrBook(), student.getName(), student.getAge(), student.getGpa(), student.getFaculty()));
}
}
}
}
-58
View File
@@ -1,58 +0,0 @@
public class Lab1 {
public static void main(String[] args) {
// char c = 'a' + '1';
char c = 97;
// char c = '1';
System.out.println(c);
System.out.println((int) c);
c++;
System.out.println(c);
System.out.println((int) c);
System.out.println((double)'1'/'3');
// System.out.println( (double) 0 / 0 );
// System.out.println( Math.sqrt(-1) );
double s = 0;
/*for (int i = 1; i <= 3; i++) { // 1) i = 1, 2) <= 3, 3) 䳿 ,
System.out.println(i); // 4) 1, 5) 2
// s = s + i;
s += i;
}*/
/*int[] array = new int[2];
for (int i = 0; i < array.length; i++) {
}*/
final int A = -3;
final int B = 0;
final int N = 2;
final int M = 2;
final int C = 1;
// boolean wasDivisionByZero = false;
// todo char
// todo[clear code] think about avoiding brackets
if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M)) {
System.out.println("Division by zero!");
return;
}
/*myLabel:*/for (int i = A; i <= N /*&& !wasDivisionByZero*/; i++) {
/*if (i + C == 0) { // todo optimize
System.out.println("Division by zero!");
wasDivisionByZero = true;
break; //todo flag vs return;
}*/
for (int j = B; j <= M; j++) {
/*if (j == 0) {
System.out.println("Division by zero!");
return;
// wasDivisionByZero = true;
// break myLabel;
}*/
s += (double) (i / j) / (i + C);
}
}
// if (!wasDivisionByZero) {
System.out.println("s = " + s);
// }
}
}
-26
View File
@@ -1,26 +0,0 @@
public class Lab2 {
public static void main(String[] args) {
int[] array = {1, 2, 3};
/*for (int i = 0; i < array.length; i++) {
if (i % 2 == 0) {
System.out.println("!" + array[i]);
} else {
System.out.println("?" + array[i]);
}
}*/
for (int i = 0; i < array.length; i+=2) {
System.out.println("!" + array[i]);
}
for (int i = 1; i < array.length; i+=2) {
System.out.println("?" + array[i]);
}
// зубчасті матриці
int[][] matrix = {
{1, 2},
{3}
};
}
}
+1 -28
View File
@@ -1,35 +1,8 @@
public class Main {
public static void main(String[] args) {
System.out.println(args[2]);
System.out.println(args[1]);
System.out.println("Hello world!");
// System.out.println(1);
int a = 1;
int b = 2;
int c = 1;
int d = 1;
System.out.println(2&1);
System.out.println(2|1);
int aa = 2;
/*if (aa) {
}*/
// System.out.println("a"&"b");
System.out.println('a'&'b');
if ((a > b) & MyBooleanMethod()) {
System.out.println("?????????????????????????");
}
}
static boolean MyBooleanMethod() {
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
return true;
}
void myFunction() {
@@ -2,8 +2,4 @@ package encapsulationInheritancePolymorphism.inheritance;
public class ElectricEngine extends Engine {
private String batteryType;
/*private class Engine {
private int power;
}*/
}
@@ -1,5 +0,0 @@
package encapsulationInheritancePolymorphism.inheritance;
public class FuelEngine extends Engine {
private String fuelType;
}
@@ -2,7 +2,6 @@ package encapsulationInheritancePolymorphism.inheritance;
public class Main {
public static void main(String[] args) {
ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
FuelEngine fuelEngine = new FuelEngine();
ElectricEngine electricEngine = new ElectricEngine();
}
}
@@ -1,14 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
public class ElectricEngine extends Engine {
private String batteryType;
@Override
public int getPower() {
return 20;
}
/*private class Engine {
private int power;
}*/
}
@@ -1,9 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
public class Engine {
private int power;
public int getPower() {
return power;
}
}
@@ -1,10 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
public class FuelEngine extends Engine {
private String fuelType;
@Override
public int getPower() {
return 50;
}
}
@@ -1,38 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
/*import encapsulationInheritancePolymorphism.inheritance.ElectricEngine;
import encapsulationInheritancePolymorphism.inheritance.FuelEngine;*/
public class Main {
public static void main(String[] args) {
/*encapsulationInheritancePolymorphism.inheritance.*/ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
/*encapsulationInheritancePolymorphism.inheritance.*/FuelEngine fuelEngine = new FuelEngine();
Engine engine1 = fuelEngine;
Engine[] engines = {
electricEngine,
fuelEngine
};
for (Engine engine : engines) {
System.out.println(engine.getPower());
}
/*for (int i = 0; i < engines.length; i++) {
System.out.println(engines[i].getPower());
}*/
// +
int a = 1;
int b = 1;
int c = a + b;
System.out.println(c);
String sA = "1";
String sB = "1";
String sC = sA + sB;
System.out.println(sC);
}
}
@@ -1,19 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
public class ElectricEngine extends Engine {
private String batteryType;
private int chargeLevel = 9;
private int criticalChargeLevel = 10;
private float coefficientCriticalPowerCut = 0.1f;
@Override
public int getPower() {
return chargeLevel > criticalChargeLevel
? super.getPower()
: (int) (super.getPower() * coefficientCriticalPowerCut);
}
/*private class Engine {
private int power;
}*/
}
@@ -1,9 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
public class Engine {
private int power = 100;
public int getPower() {
return power;
}
}
@@ -1,10 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
public class FuelEngine extends Engine {
private String fuelType;
/*public int getPower() {
return 50;
}*/
}
@@ -1,28 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
/*import encapsulationInheritancePolymorphism.inheritance.ElectricEngine;
import encapsulationInheritancePolymorphism.inheritance.FuelEngine;*/
public class Main {
public static void main(String[] args) {
/*encapsulationInheritancePolymorphism.inheritance.*/
ElectricEngine electricEngine = new ElectricEngine(); // створення нового об'єкту (екземпляру) класу ElectricEngine
/*encapsulationInheritancePolymorphism.inheritance.*/
FuelEngine fuelEngine = new FuelEngine();
Engine engine1 = fuelEngine;
Engine[] engines = {
electricEngine,
fuelEngine
};
for (Engine engine : engines) {
System.out.println(engine.getPower());
}
/*for (int i = 0; i < engines.length; i++) {
System.out.println(engines[i].getPower());
}*/
}
}
@@ -1,17 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.overload;
public class MyClassForOverloadExample {
void myMethod(int a) {
System.out.println("Integer: " + a);
}
void myMethod(double a) {
System.out.println("Double: " + a);
}
public static void main(String[] args) {
MyClassForOverloadExample overload = new MyClassForOverloadExample();
overload.myMethod(1);
overload.myMethod(0.1);
}
}