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AraneWiFiAraneWiFi
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Лабораторные работы №21-30
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‎students/23K0350/23K0350-p21-retry/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>23K0350</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>23K0350-p21</artifactId>
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<description>Стирание типов</description>
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</project>

‎students/23K0350/23K0350-p21-retry/src/main/java/ru/mirea/practice/s23k0350/task1/AnyArray.java

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package ru.mirea.practice.s23k0350.task1;
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import java.util.ArrayList;
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import java.util.List;
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public class AnyArray<T> {
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public List<T> array;
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public AnyArray() {
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this.array = new ArrayList<>();
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}
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public void add(T item) {
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array.add(item);
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}
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public void printElements() {
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for (T item: array) {
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System.out.println(item.toString());
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}
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}
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}

‎students/23K0350/23K0350-p21-retry/src/main/java/ru/mirea/practice/s23k0350/task1/Main.java

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package ru.mirea.practice.s23k0350.task1;
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import ru.mirea.practice.s23k0350.task2.TestHuman;
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abstract class Main {
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public static void main(String[] args) {
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AnyArray<Object> testing = new AnyArray<>();
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TestHuman female = new TestHuman("Natasha", 27);
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testing.add(10);
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testing.add("Hello");
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testing.add(true);
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testing.add(3.14);
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testing.add(female);
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System.out.println("Elements:");
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testing.printElements();
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}
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}
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‎students/23K0350/23K0350-p21-retry/src/main/java/ru/mirea/practice/s23k0350/task2/AnyArrayElecBug.java

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package ru.mirea.practice.s23k0350.task2;
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import ru.mirea.practice.s23k0350.task1.AnyArray;
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public class AnyArrayElecBug<T> extends AnyArray<T> {
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public T returnElement(int index) {
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return array.get(index);
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}
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}

‎students/23K0350/23K0350-p21-retry/src/main/java/ru/mirea/practice/s23k0350/task2/Main.java

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package ru.mirea.practice.s23k0350.task2;
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abstract class Main {
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public static void main(String[] args) {
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AnyArrayElecBug<Object> test = new AnyArrayElecBug<>();
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TestHuman male = new TestHuman("Oleg", 35);
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test.add(10);
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test.add(male);
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test.add("Hello");
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test.add(true);
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test.add(3.14);
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System.out.println("Elements:");
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test.printElements();
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System.out.println("w/ Index:\n" + test.returnElement(1));
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}
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}

‎students/23K0350/23K0350-p21-retry/src/main/java/ru/mirea/practice/s23k0350/task2/TestHuman.java

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package ru.mirea.practice.s23k0350.task2;
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public class TestHuman {
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String name;
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int age;
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public TestHuman(String name, int age) {
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this.age = age;
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this.name = name;
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}
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public String toString() {
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return "Name: " + name + "\n" + "Age:" + age;
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}
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}

‎students/23K0350/23K0350-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>23K0350</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>23K0350-p22</artifactId>
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<description>Стек</description>
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</project>

‎students/23K0350/23K0350-p22/src/main/java/ru/mirea/practice/s23k0350/Main.java

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package ru.mirea.practice.s23k0350;
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abstract class Main {
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public static void main(String[] args) {
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String expression = "2 3 * 4 5 * + ";
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RpnCalculator rp = new RpnCalculator(expression);
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System.out.println("Результат: " + rp.evaluate(expression));
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}
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}
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‎students/23K0350/23K0350-p22/src/main/java/ru/mirea/practice/s23k0350/RpnCalculator.java

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package ru.mirea.practice.s23k0350;
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import java.util.Stack;
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public class RpnCalculator {
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String expression;
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public RpnCalculator(String expression) {
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this.expression = expression;
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}
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public static double evaluate(String expression) {
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Stack<Double> stack = new Stack<>();
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String[] tokens = expression.split(" ");
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for (String token : tokens) {
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if (isNumber(token)) {
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stack.push(Double.parseDouble(token));
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} else {
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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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}
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}
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return stack.pop();
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}
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private static boolean isNumber(String token) {
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try {
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Double.parseDouble(token);
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return true;
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} catch (NumberFormatException e) {
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return false;
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}
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}
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private static double applyOperation(double a, double b, String operator) {
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if ("+".equals(operator)) {
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return a + b;
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} else if ("-".equals(operator)) {
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return a - b;
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} else if ("*".equals(operator)) {
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return a * b;
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} else if ("/".equals(operator)) {
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if (b == 0) {
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throw new UnsupportedOperationException("Cannot divide by zero");
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}
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return a / b;
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}
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throw new UnsupportedOperationException("Unsupported operation: " + operator);
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}
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}
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‎students/23K0350/23K0350-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>23K0350</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>23K0350-p23</artifactId>
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<description>Очередь</description>
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</project>

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