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PastorPastor
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Merge pull request #654 from K-Roma/Practic-27-30
Practic 27-30
2 parents ecfc688 + 050163f commit b8134f3

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‎students/23K0354/23K0354-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>23K0354</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>23K0354-p21</artifactId>
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<description> Стирание типов в Джава </description>
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</project>

‎students/23K0354/23K0354-p21/src/main/java/ru/mirea/practices0000001/task1/Converter.java

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package ru.mirea.practices0000001.task1;
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import java.util.Arrays;
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import java.util.List;
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public abstract class Converter {
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public static <T> List<T> convertArrayToList(T[] array) {
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return Arrays.asList(array);
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}
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public static void main(String[] args) {
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String[] stringArray = {"a", "b", "c"};
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List<String> stringList = convertArrayToList(stringArray);
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System.out.println("Список строк: " + stringList);
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Integer[] intArray = {1, 2, 3};
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List<Integer> intList = convertArrayToList(intArray);
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System.out.println("Список чисел: " + intList);
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}
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}

‎students/23K0354/23K0354-p21/src/main/java/ru/mirea/practices0000001/task4/DirectoryUtils.java

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package ru.mirea.practices0000001.task4;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.List;
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public abstract class DirectoryUtils {
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public static List<String> getDirectoryContents(String path) {
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File directory = new File(path);
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List<String> fileList = new ArrayList<>();
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if (directory.isDirectory()) {
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for (File file : directory.listFiles()) {
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fileList.add(file.getName());
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}
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}
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return fileList;
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}
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public static void main(String[] args) {
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List<String> contents = getDirectoryContents("/Users/viktoriapermakova/Desktop/Java");
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contents.stream().limit(5).forEach(System.out::println);
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}
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}

‎students/23K0354/23K0354-p21/src/main/java/ru/mirea/practices0000001/task5/Main.java

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package ru.mirea.practices0000001.task5;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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public abstract class Main {
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public static void main(String[] args) {
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List<Integer> list = Solution.newArrayList(1, 2, 3, 4, 5);
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System.out.println("ArrayList: " + list);
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Set<String> set = Solution.newHashSet("a", "b", "c");
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System.out.println("HashSet: " + set);
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Map<String, Integer> map = Solution.newHashMap("key1", 100);
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System.out.println("HashMap: " + map);
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}
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}

‎students/23K0354/23K0354-p21/src/main/java/ru/mirea/practices0000001/task5/Solution.java

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package ru.mirea.practices0000001.task5;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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public abstract class Solution {
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public static <T> List<T> newArrayList(T... elements) {
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List<T> list = new ArrayList<>();
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for (T element : elements) {
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list.add(element);
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}
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return list;
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}
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public static <T> Set<T> newHashSet(T... elements) {
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Set<T> set = new HashSet<>();
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for (T element : elements) {
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set.add(element);
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}
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return set;
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}
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public static <K, V> Map<K, V> newHashMap(K key, V value) {
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Map<K, V> map = new HashMap<>();
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map.put(key, value);
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return map;
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}
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}

‎students/23K0354/23K0354-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>23K0354</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>23K0354-p22</artifactId>
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<description> Абстрактные типы данных. Стек </description>
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</project>

‎students/23K0354/23K0354-p22/src/main/java/ru/mirea/practices0000001/task1/RpnCalculator.java

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package ru.mirea.practices0000001.task1;
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import java.util.Scanner;
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import java.util.Stack;
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public abstract class RpnCalculator {
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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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switch (token) {
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case "+":
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stack.push(stack.pop() + stack.pop());
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break;
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case "-":
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double subtrahend = stack.pop();
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double minuend = stack.pop();
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stack.push(minuend - subtrahend);
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break;
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case "*":
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stack.push(stack.pop() * stack.pop());
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break;
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case "/":
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double divisor = stack.pop();
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double dividend = stack.pop();
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stack.push(dividend / divisor);
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break;
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default:
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stack.push(Double.parseDouble(token));
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break;
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}
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}
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return stack.pop();
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}
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public static void main(String[] args) {
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try (Scanner scanner = new Scanner(System.in)) {
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System.out.print("Введите выражение в обратной польской нотации (RPN): ");
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String expression = scanner.nextLine();
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if (expression != null && !expression.trim().isEmpty()) {
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try {
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double result = evaluate(expression);
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System.out.println("Результат: " + result);
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} catch (Exception e) {
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System.out.println("Ошибка: " + e.getMessage());
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}
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} else {
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System.out.println("Вы не ввели выражение.");
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}
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}
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}
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}

‎students/23K0354/23K0354-p22/src/main/java/ru/mirea/practices0000001/task2/CalculatorController.java

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package ru.mirea.practices0000001.task2;
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import javax.swing.JButton;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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public class CalculatorController {
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private final CalculatorModel model;
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private final CalculatorView view;
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public CalculatorController(CalculatorModel model, CalculatorView view) {
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this.model = model;
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this.view = view;
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this.view.addCalculateListener(new CalculateListener());
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this.view.addNumberButtonListener(new NumberButtonListener());
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this.view.addOperationButtonListener(new OperationButtonListener());
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}
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private class CalculateListener implements ActionListener {
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@Override
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public void actionPerformed(ActionEvent e) {
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String input = view.getInput();
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try {
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double result = model.evaluate(input);
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view.setResult("Результат: " + result);
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} catch (Exception ex) {
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view.setResult("Ошибка: " + ex.getMessage());
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}
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}
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}
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private class NumberButtonListener implements ActionListener {
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@Override
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public void actionPerformed(ActionEvent e) {
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JButton source = (JButton) e.getSource();
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view.setInput(view.getInput() + source.getText());
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}
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}
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private class OperationButtonListener implements ActionListener {
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@Override
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public void actionPerformed(ActionEvent e) {
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JButton source = (JButton) e.getSource();
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String operation = source.getText();
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if ("C".equals(operation)) {
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view.setInput("");
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} else {
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view.setInput(view.getInput() + " " + operation + " ");
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}
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}
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}
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}

‎students/23K0354/23K0354-p22/src/main/java/ru/mirea/practices0000001/task2/CalculatorModel.java

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package ru.mirea.practices0000001.task2;
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import java.util.Stack;
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public class CalculatorModel {
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public double evaluate(String expression) {
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Stack<Double> stack = new Stack<>();
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String[] tokens = expression.trim().split("\\s+");
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for (String token : tokens) {
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switch (token) {
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case "+":
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stack.push(stack.pop() + stack.pop());
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break;
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case "-":
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double subtrahend = stack.pop();
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double minuend = stack.pop();
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stack.push(minuend - subtrahend);
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break;
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case "*":
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stack.push(stack.pop() * stack.pop());
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break;
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case "/":
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double divisor = stack.pop();
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double dividend = stack.pop();
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stack.push(dividend / divisor);
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break;
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default:
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stack.push(Double.parseDouble(token));
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break;
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}
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}
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return stack.pop();
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}
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}

‎students/23K0354/23K0354-p22/src/main/java/ru/mirea/practices0000001/task2/CalculatorView.java

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package ru.mirea.practices0000001.task2;
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import javax.swing.JButton;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.JPanel;
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import javax.swing.JTextArea;
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import javax.swing.JTextField;
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import java.awt.GridLayout;
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import java.awt.event.ActionListener;
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public class CalculatorView {
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private final JTextField inputField;
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private final JTextArea resultArea;
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private final JButton[] numberButtons;
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private final JButton[] operationButtons;
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private final JButton calculateButton;
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private final String[] operations = {"+", "-", "*", "/", "C"};
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public CalculatorView() {
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final JFrame frame = new JFrame("RPN Calculator");
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inputField = new JTextField(20);
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resultArea = new JTextArea(10, 30);
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calculateButton = new JButton("Вычислить");
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numberButtons = new JButton[10];
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for (int i = 0; i < 10; i++) {
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numberButtons[i] = new JButton(String.valueOf(i));
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}
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operationButtons = new JButton[operations.length];
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for (int i = 0; i < operations.length; i++) {
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operationButtons[i] = new JButton(operations[i]);
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}
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JPanel panel = new JPanel();
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panel.setLayout(new GridLayout(5, 4));
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panel.add(new JLabel("Введите выражение (RPN):"));
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panel.add(inputField);
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panel.add(calculateButton);
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panel.add(resultArea);
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for (JButton numberButton : numberButtons) {
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panel.add(numberButton);
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}
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for (JButton operationButton : operationButtons) {
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panel.add(operationButton);
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}
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resultArea.setEditable(false);
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frame.add(panel);
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frame.setSize(400, 400);
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.setVisible(true);
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}
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public String getInput() {
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return inputField.getText();
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}
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public void setInput(String input) {
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inputField.setText(input);
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}
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public void setResult(String result) {
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resultArea.setText(result);
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}
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public void addCalculateListener(ActionListener listenForCalcButton) {
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calculateButton.addActionListener(listenForCalcButton);
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}
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public void addNumberButtonListener(ActionListener listener) {
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for (JButton numberButton : numberButtons) {
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numberButton.addActionListener(listener);
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}
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}
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public void addOperationButtonListener(ActionListener listener) {
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for (JButton operationButton : operationButtons) {
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operationButton.addActionListener(listener);
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}
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}
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}

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