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evoliatraevoliatra
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Pr21-32
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‎students/23K9901/23K9901-p21/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>23K9901</artifactId>
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<groupId>ru.mirea.practice</groupId>
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<version>2024.1</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<artifactId>23K9901-p21</artifactId>
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<description>Второе задание</description>
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</project>

‎students/23K9901/23K9901-p21/src/main/java/ru/mirea/practice/s0000001/ArrayElementGetter.java

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package ru.mirea.practice.s0000001;
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public class ArrayElementGetter<T> {
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private T[] array;
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public ArrayElementGetter(T[] array) {
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this.array = array;
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}
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public T getElementByIndex(int index) {
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if (index < 0 || index >= array.length) {
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throw new IndexOutOfBoundsException("Invalid index: " + index);
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}
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return array[index];
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}
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}

‎students/23K9901/23K9901-p21/src/main/java/ru/mirea/practice/s0000001/Main.java

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package ru.mirea.practice.s0000001;
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abstract class Main {
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public static void main(String[] args) {
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Integer[] numbers = {10, 20, 30, 40, 50};
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ArrayElementGetter<Integer> intGetter = new ArrayElementGetter<>(numbers);
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System.out.println("Элемент по индексу 2: " + intGetter.getElementByIndex(2));
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String[] words = {"apple", "banana", "cherry"};
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ArrayElementGetter<String> stringGetter = new ArrayElementGetter<>(words);
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System.out.println("Элемент по индексу 1: " + stringGetter.getElementByIndex(1));
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}
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}

‎students/23K9901/23K9901-p22/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>23K9901</artifactId>
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<groupId>ru.mirea.practice</groupId>
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<version>2024.1</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<artifactId>23K9901-p22</artifactId>
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<description>Второе задание</description>
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</project>

‎students/23K9901/23K9901-p22/src/main/java/ru/mirea/practice/s0000001/ArrayElementGetter.java

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package ru.mirea.practice.s0000001;
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public class ArrayElementGetter<T> {
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private T[] array;
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public ArrayElementGetter(T[] array) {
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this.array = array;
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}
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public T getElementByIndex(int index) {
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if (index < 0 || index >= array.length) {
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throw new IndexOutOfBoundsException("Invalid index: " + index);
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}
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return array[index];
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}
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}

‎students/23K9901/23K9901-p22/src/main/java/ru/mirea/practice/s0000001/Main3.java

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package ru.mirea.practice.s0000001;
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abstract class Main3 {
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public static void main(String[] args) {
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Integer[] numbers = {10, 20, 30, 40, 50};
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ArrayElementGetter<Integer> intGetter = new ArrayElementGetter<>(numbers);
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System.out.println("Элемент по индексу 2: " + intGetter.getElementByIndex(2));
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String[] words = {"apple", "banana", "cherry"};
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ArrayElementGetter<String> stringGetter = new ArrayElementGetter<>(words);
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System.out.println("Элемент по индексу 1: " + stringGetter.getElementByIndex(1));
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}
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}

‎students/23K9901/23K9901-p23/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>23K9901</artifactId>
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<groupId>ru.mirea.practice</groupId>
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<version>2024.1</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<artifactId>23K9901-p23</artifactId>
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<description>Второе задание</description>
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</project>

‎students/23K9901/23K9901-p23/src/main/java/ru/mirea/practice/s0000001/Main.java

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package ru.mirea.practice.s0000001;
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abstract class Main {
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public static void main(String[] args) {
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String rpnExpression = "3 4 + 2 * 7 /";
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double result = RPNCalc.calculate(rpnExpression);
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System.out.println("Результат: " + result);
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}
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}

‎students/23K9901/23K9901-p23/src/main/java/ru/mirea/practice/s0000001/RPNCalc.java

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package ru.mirea.practice.s0000001;
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import java.util.Stack;
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abstract class RPnCalculator {
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public static double calculate(String expression) {
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Stack<Double> stack = new Stack<>();
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String[] tokens = expression.split("\\s+");
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for (String token : tokens) {
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if (isOperator(token)) {
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double b = stack.pop();
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double a = stack.pop();
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stack.push(applyOperation(a, b, token));
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} else {
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stack.push(Double.parseDouble(token));
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}
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}
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return stack.pop();
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}
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private static boolean isOperator(String token) {
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return "+".equals(token) || "-".equals(token) || "*".equals(token) || "/".equals(token);
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}
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private static double applyOperation(double a, double b, String operator) {
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switch (operator) {
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case "+":
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return a + b;
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case "-":
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return a - b;
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case "*":
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return a * b;
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case "/":
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if (b == 0) {
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throw new ArithmeticException("Деление на ноль");
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}
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return a / b;
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default:
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throw new IllegalArgumentException("Недопустимый оператор: " + operator);
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}
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}
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}

‎students/23K9901/23K9901-p24/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<artifactId>23K9901</artifactId>
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<groupId>ru.mirea.practice</groupId>
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<version>2024.1</version>
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<relativePath>../pom.xml</relativePath>
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</parent>
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<artifactId>23K9901-p24</artifactId>
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<description>Второе задание</description>
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</project>

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