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Merge pull request #2 from ASDjonok/ІО-25/01-Антоненко-Віолетта-Станіславівна

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Done lab 1-3
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xivihwa 2023-04-04 17:41:26 +03:00 committed by GitHub
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48 changed files with 205 additions and 605 deletions
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Main.java

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import java.util.Scanner;
public class Main {
public static void main(String[] args) {
//C2 = 2501 % 2 = 1, і операція O1 буде відніманням (-).
//C3 = 2501 % 3 = 2
//C5 = 2501 % 5 = 1, і операція O2 буде діленням (/).
//C7 = 2501 % 7 = 4, тип індексів i та j буде char.
double result = 0; // результат
char i, j;
char operation1 = '-';
double constant = 2.0;
Scanner scanner = new Scanner(System.in);
System.out.print("Введіть значення n: ");
int n = scanner.nextInt();
System.out.print("Введіть значення m: ");
int m = scanner.nextInt();
// Обчислення значення функції S
for (i = 'a'; i <= 'a' + n - 1; i++) {
for (j = 'b'; j <= 'b' + m - 1; j++) {
try {
double value = (double) i / applyOperation(j, operation1, constant);
result += value;
} catch (ArithmeticException e) {
System.out.println("Ділення на нуль: " + e.getMessage());
} catch (Exception e) {
System.out.println("Виникла помилка: " + e.getMessage());
}
}
}
// Виведення результату
System.out.println("Результат: " + result);
}
// Метод, який застосовує операцію О1 до двох чисел
public static double applyOperation(char j, char operation, double constant) throws Exception {
switch (operation) {
case '-':
return (double) j - constant;
case '/':
if (constant == 0.0) {
throw new ArithmeticException("C не може бути рівним нулю");
} else {
return (double) j / constant;
}
default:
throw new Exception("Непідтримувана операція: " + operation);
}
}
}

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import java.util.Arrays;
public class Main {
public static void main(String[] args) {
byte[][] matrix = {{4, 7, 3}, {4, 7, 6}, {7, 10, 9}};
//C5 = 2501 mod 5 = 1, тому C = B^T (транспонування матриці)
//C7 = 2501 mod 7 = 1, тому тип елементів матриці має бути byte
//C11 = 2501 mod 11 = 10, тому треба знайти середнє значення елементів матриці
// Виконуємо дію з матрицею: транспонування матриці B
byte[][] transposedMatrix = transposeMatrix(matrix);
System.out.println("Transposed matrix: ");
printMatrix(transposedMatrix);
// Виконуємо дію з матрицею C: знаходимо середнє значення елементів матриці
double average = calculateAverage(transposedMatrix);
System.out.println("Cереднє значення елементів матриці: " + average);
}
// Метод для транспонування матриці
private static byte[][] transposeMatrix(byte[][] matrix) {
int rows = matrix.length;
int columns = matrix[0].length;
byte[][] transposedMatrix = new byte[columns][rows];
for (int i = 0; i < rows; i++) {
for (int j = 0; j < columns; j++) {
transposedMatrix[j][i] = matrix[i][j];
}
}
return transposedMatrix;
}
// Метод для знаходження середнього значення елементів матриці
private static double calculateAverage(byte[][] matrix) {
int rows = matrix.length;
int columns = matrix[0].length;
int sum = 0;
for (int i = 0; i < rows; i++) {
for (int j = 0; j < columns; j++) {
sum += matrix[i][j];
}
}
return (double) sum / (rows * columns);
}
// Метод для виведення матриці на екран
private static void printMatrix(byte[][] matrix) {
for (byte[] row : matrix) {
System.out.println(Arrays.toString(row));
}
}
}

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<?xml version="1.0" encoding="UTF-8"?>
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import java.util.HashSet;
public class Main {
public static void main(String[] args) {
String inputText = "Who are you? What is your name? Where are you from?";
int targetLength = 3;
try {
HashSet<String> uniqueWords = new HashSet<String>();
String[] sentences = inputText.split("[?]");
for (String sentence : sentences) {
String[] words = sentence.trim().split("\\s+");
for (String word : words) {
if (word.length() == targetLength) {
uniqueWords.add(word.toLowerCase());
}
}
}
System.out.println("Unique words of length " + targetLength + " in the input text are: " + uniqueWords);
} catch (Exception e) {
System.out.println("An error occurred: " + e.getMessage());
}
}
}

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src/Lab1.java
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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) <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> i = 1, 2) <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <= 3, 3) <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 䳿 <EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,
System.out.println(i); // 4) <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD> 1, 5) <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 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);
// }
}
}

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src/Lab2.java
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public class Lab2 {
public static void main(String[] args) {
final int A = 2;
final int[][] MATRIX_B = {
{1, 202, 1, 1, 202, 3, 1, 202, 3,},
{1, 202, 1, 1, 202, 3, 1, 202, 3,},
{1, 1, 3, 1, 202, 3, 1, 202, 3,},
// {4, 5, 6,},
};
int[][] MATRIX_C = multiplication(A, MATRIX_B);
print(MATRIX_C);
System.out.println("Sum of smallest elements in every column: " + sumOfSmallestElementsInEveryColumn(MATRIX_C));
/*int[] array = {1, 2, 3};
int[] array2 = new int[3];
Object[] array3 = new String[3];
System.out.println(array3[0]); //nothing, trash from the memory, null || null
System.out.println(array2[0]); //nothing, trash from the memory, null || 0
System.out.println(array[0]); // || 1
int[][] matrix2 = new int[2][3];
matrix2[0] = new int[2];
matrix2[1] = new int[1];
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}
};
// C=a×B, a - const
// final int[][] MATRIX_C = int;
MATRIX_B[0][0] = 2;
MATRIX_B[0] = new int[]{1, 2};
System.out.println(MATRIX_B[0][0]);
MATRIX_B = new int[][]{
{1, 2},
{3}
};*/
}
private static int sumOfSmallestElementsInEveryColumn(final int[][] MATRIX_C) {
// todo check different length of rows
// todo try to change i and j
// todo check repetition of minimal elements
int sum = 0;
for (int i = 0; i < MATRIX_C[0].length; i++) {
int tmpSmallest = MATRIX_C[0][i];
for (int j = 1; j < MATRIX_C.length; j++) {
if (MATRIX_C[j][i] < tmpSmallest) {
tmpSmallest = MATRIX_C[j][i];
}
}
sum += tmpSmallest;
}
return sum;
}
private static void print(final int[][] MATRIX_C) {
for (int i = 0; i < MATRIX_C.length; i++) {
for (int j = 0; j < MATRIX_C[i].length; j++) {
// System.out.print(MATRIX_C[i][j] + "\t");//printf("%4d",
System.out.printf("%4d ", MATRIX_C[i][j]);//printf("%4d",
}
System.out.println();
}
}
private static int[][] multiplication(int A, final int[][] MATRIX_B) {
final int[][] MATRIX_C = new int[MATRIX_B.length][/*MATRIX_B[0].length*/]; // todo !!!DANGER different lengths of rows
// final int[][] MATRIX_C = MATRIX_B;
for (int i = 0; i < MATRIX_B.length; i++) {
MATRIX_C[i] = new int[MATRIX_B[i].length];
for (int j = 0; j < MATRIX_B[i].length; j++) {
MATRIX_C[i][j] = MATRIX_B[i][j] * A;
}
}
return MATRIX_C;
}
}

42
src/Main.java
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@ -1,42 +0,0 @@
public class Main {
public static void main(String[] args) {
System.out.println(args[2]);
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() {
}
int myFunction2() {
return 1;
}
}

20
src/encapsulationInheritancePolymorphism/Encapsulation.java
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@ -1,20 +0,0 @@
package encapsulationInheritancePolymorphism;
public class Encapsulation {
/*private*/ int field;
private int field2;
// int a = 1;
public void myMethodForTheField () {
System.out.println(field);
}
public void myMethodForTheField2 () {
System.out.println(field);
}
public void myMethodForTheFieldAndTheField2 () {
System.out.println(field);
}
}

10
src/encapsulationInheritancePolymorphism/EncapsulationInheritancePolymorphism.java
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@ -1,10 +0,0 @@
package encapsulationInheritancePolymorphism;
public class EncapsulationInheritancePolymorphism {
public static void main(String[] args) {
int a = 1;
// var b = 2;
// System.out.println(b);
}
}

14
src/encapsulationInheritancePolymorphism/Main.java
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@ -1,14 +0,0 @@
package encapsulationInheritancePolymorphism;
public class Main {
public static void main(String[] args) {
Student student = new Student();
//...
student.setFaculty("FPM", "MO-22");
}
}

18
src/encapsulationInheritancePolymorphism/Student.java
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@ -1,18 +0,0 @@
package encapsulationInheritancePolymorphism;
public class Student {
private String name;
private String surname;
private String group;
private String faculty;
public String getName() {
return name;
}
public void setFaculty(String faculty, String group) {
this.faculty = faculty;
this.group = group;
}
}

9
src/encapsulationInheritancePolymorphism/inheritance/ElectricEngine.java
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@ -1,9 +0,0 @@
package encapsulationInheritancePolymorphism.inheritance;
public class ElectricEngine extends Engine {
private String batteryType;
/*private class Engine {
private int power;
}*/
}

5
src/encapsulationInheritancePolymorphism/inheritance/Engine.java
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@ -1,5 +0,0 @@
package encapsulationInheritancePolymorphism.inheritance;
public class Engine {
private int power;
}

5
src/encapsulationInheritancePolymorphism/inheritance/FuelEngine.java
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@ -1,5 +0,0 @@
package encapsulationInheritancePolymorphism.inheritance;
public class FuelEngine extends Engine {
private String fuelType;
}

8
src/encapsulationInheritancePolymorphism/inheritance/Main.java
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@ -1,8 +0,0 @@
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();
}
}

14
src/encapsulationInheritancePolymorphism/polymorphism/ElectricEngine.java
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@ -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;
}*/
}

9
src/encapsulationInheritancePolymorphism/polymorphism/Engine.java
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@ -1,9 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
public class Engine {
private int power;
public int getPower() {
return power;
}
}

10
src/encapsulationInheritancePolymorphism/polymorphism/FuelEngine.java
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@ -1,10 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism;
public class FuelEngine extends Engine {
private String fuelType;
@Override
public int getPower() {
return 50;
}
}

38
src/encapsulationInheritancePolymorphism/polymorphism/Main.java
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@ -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);
}
}

19
src/encapsulationInheritancePolymorphism/polymorphism/enhanced/ElectricEngine.java
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@ -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;
}*/
}

9
src/encapsulationInheritancePolymorphism/polymorphism/enhanced/Engine.java
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@ -1,9 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
public class Engine {
private int power = 100;
public int getPower() {
return power;
}
}

10
src/encapsulationInheritancePolymorphism/polymorphism/enhanced/FuelEngine.java
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@ -1,10 +0,0 @@
package encapsulationInheritancePolymorphism.polymorphism.enhanced;
public class FuelEngine extends Engine {
private String fuelType;
/*public int getPower() {
return 50;
}*/
}

28
src/encapsulationInheritancePolymorphism/polymorphism/enhanced/Main.java
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@ -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());
}*/
}
}

17
src/encapsulationInheritancePolymorphism/polymorphism/overload/MyClassForOverloadExample.java
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@ -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);
}
}

13
src/test/A.java
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@ -1,13 +0,0 @@
package test;
public class A {
/*private*/ int f/* = 3*/;
public int getF() {
return f;
}
public void setF(int f) {
this.f = f;
}
}

15
src/test/Main.java
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@ -1,15 +0,0 @@
package test;
public class Main {
public static void main(String[] args) {
A a = new A();
System.out.println(a.getF());
a.setF(1);
System.out.println(a.getF());
System.out.println(a.f);
int[] array = {1, 2, 1};
System.out.println(array.length);
}
}