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PastorPastor
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Merge pull request #674 from Kermesina/main
Практические №21-32
2 parents 0ff9e51 + 8f2ec26 commit a75d52c

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‎students/23K0093/23K0093-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>23K0093</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>23K0093-p21</artifactId>
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<description>Афанасьева</description>
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</project>

‎students/23K0093/23K0093-p21/src/main/java/ru/mirea/practice/s23k0093/ArrayElementRetriever.java

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package ru.mirea.practice.s23k0093;
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public abstract class ArrayElementRetriever {
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public static <T> T getElementAtIndex(T[] array, int index) {
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if (index < 0 || index >= array.length) {
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throw new IndexOutOfBoundsException("Индекс вне границ массива");
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}
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return array[index];
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}
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}

‎students/23K0093/23K0093-p21/src/main/java/ru/mirea/practice/s23k0093/ArrayToListConverter.java

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package ru.mirea.practice.s23k0093;
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import java.util.ArrayList;
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import java.util.List;
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public abstract class ArrayToListConverter {
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public static <T> List<T> convertArrayToList(T[] array) {
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List<T> list = new ArrayList<>();
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for (T element : array) {
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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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}

‎students/23K0093/23K0093-p21/src/main/java/ru/mirea/practice/s23k0093/TestMethod.java

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package ru.mirea.practice.s23k0093;
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import java.util.List;
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public abstract class TestMethod {
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public static void main(String[] args) {
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String[] stringArray = {"Я", "люблю", "спать"};
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List<String> stringList = ArrayToListConverter.convertArrayToList(stringArray);
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System.out.println("Список строк: " + stringList);
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String element = ArrayElementRetriever.getElementAtIndex(stringArray, 1); // получаем 'banana'
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System.out.println("Элемент по индексу 1: " + element);
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Integer[] intArray = {1, 2, 3, 4, 5};
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List<Integer> intList = ArrayToListConverter.convertArrayToList(intArray);
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System.out.println("Список чисел: " + intList);
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Integer num = ArrayElementRetriever.getElementAtIndex(intArray, 3); // получаем '4'
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System.out.println("Элемент по индексу 3: " + num);
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}
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}

‎students/23K0093/23K0093-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>23K0093</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>23K0093-p22</artifactId>
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<description>Афанасьева</description>
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</project>

‎students/23K0093/23K0093-p22/src/main/java/ru/mirea/practice/s23k0093/RpnCalculator.java

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package ru.mirea.practice.s23k0093;
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public class RpnCalculator {
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private Stack stack;
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public RpnCalculator(int size) {
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stack = new Stack(size);
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}
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public double evaluate(String expression) {
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String[] strings = expression.split(" ");
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for (String element : strings) {
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try {
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float f = Float.parseFloat(element);
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stack.push(f);
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} catch (NumberFormatException e) {
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performOperation(element);
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}
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}
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return stack.pop();
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}
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private void performOperation(String operator) {
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float secondOperand = stack.pop();
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float firstOperand = stack.pop();
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switch (operator) {
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case "+":
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stack.push(firstOperand + secondOperand);
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break;
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case "-":
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stack.push(firstOperand - secondOperand);
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break;
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case "*":
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stack.push(firstOperand * secondOperand);
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break;
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case "/":
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if (secondOperand == 0) {
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throw new ArithmeticException("Ошибка: Деление на ноль");
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}
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stack.push(firstOperand / secondOperand);
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break;
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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/23K0093/23K0093-p22/src/main/java/ru/mirea/practice/s23k0093/Stack.java

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package ru.mirea.practice.s23k0093;
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class Stack {
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// store elements of stack
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private float[] arr;
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// represent top of stack
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private int top;
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// total capacity of the stack
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private int capacity;
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// Creating a stack
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Stack(int size) {
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// initialize the array
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// initialize the stack variables
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arr = new float[size];
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capacity = size;
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top = -1;
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}
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// push elements to the top of stack
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public void push(float x) {
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if (isFull()) {
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System.out.println("Stack OverFlow");
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// terminates the program
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System.exit(1);
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}
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// insert element on top of stack
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System.out.println("Inserting " + x);
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arr[++top] = x;
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}
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// pop elements from top of stack
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public float pop() {
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// if stack is empty
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// no element to pop
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if (isEmpty()) {
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System.out.println("STACK EMPTY");
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// terminates the program
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System.exit(1);
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}
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// pop element from top of stack
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return arr[top--];
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}
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// return size of the stack
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public int getSize() {
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return top + 1;
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}
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// check if the stack is empty
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public Boolean isEmpty() {
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return top == -1;
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}
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// check if the stack is full
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public Boolean isFull() {
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return top == capacity - 1;
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}
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// display elements of stack
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public void printStack() {
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for (int i = 0; i <= top; i++) {
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System.out.print(arr[i] + ", ");
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}
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}
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}

‎students/23K0093/23K0093-p22/src/main/java/ru/mirea/practice/s23k0093/Test.java

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package ru.mirea.practice.s23k0093;
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public abstract class Test {
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public static void main(String[] args) {
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RpnCalculator calculator = new RpnCalculator(10);
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System.out.println("16.1 3.9 + = " + calculator.evaluate("16.1 3.9 +"));
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System.out.println("8 4 - = " + calculator.evaluate("8 4 -"));
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System.out.println("28 0.5 * = " + calculator.evaluate("28 0.5 *"));
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System.out.println("7 2 / = " + calculator.evaluate("7 2 /"));
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System.out.println("3 4 + 2 * = " + calculator.evaluate("3 4 + 2 *"));
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try {
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System.out.println("38 0 / = " + calculator.evaluate("38 0 /"));
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} catch (ArithmeticException e) {
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System.out.println(e.getMessage());
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}
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}
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}

‎students/23K0093/23K0093-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>23K0093</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>23K0093-p23</artifactId>
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<description>Афанасьева</description>
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</project>

‎students/23K0093/23K0093-p23/src/main/java/ru/mirea/practice/s23k0093/AbstractQueue.java

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package ru.mirea.practice.s23k0093;
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public abstract class AbstractQueue<T> implements Queue<T> {
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protected int size;
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@Override
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public boolean isEmpty() {
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return size == 0;
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}
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@Override
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public int size() {
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return size;
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}
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}

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