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Merge pull request #8943 from JimsimroDev/main
#18-Java
2 parents fdfc4f7 + 142573b commit 9bf7276

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‎Roadmap/11 - MANEJO DE FICHEROS/java/JimsimroDev.java‎

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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.Scanner;
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public class JimsimroDev {
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private final static String DIVLINE = "::::::::::::::::::::::::::::::::::::::::::::::::::::";
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private static void menu() {
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String menu = """
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1 ~ Create product
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2 ~ Consult product
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3 ~ Update product
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4 ~ Delete product
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5 ~ List products
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6 ~ Calculate total sales
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7 ~ Calculate product sales
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8 ~ Exit
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""";
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System.out.println(menu);
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}
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private static void actions() {
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Scanner in = new Scanner(System.in);
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int option = 0;
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while (option != 8) {
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menu();
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System.out.println("Choose an option: ");
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option = in.nextInt();
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in.nextLine();
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switch (option) {
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case 1:
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System.out.print("Name: ");
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String name = in.nextLine();
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System.out.print("Quantity: ");
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int quantity = in.nextInt();
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System.out.print("Price: ");
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int price = in.nextInt();
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try {
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createProduct(name, quantity, price);
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} catch (IOException e) {
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e.printStackTrace();
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}
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break;
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case 2:
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System.out.print("Name of the product to search: ");
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String nameToSearch = in.nextLine();
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consultProduct(nameToSearch);
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break;
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case 3:
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System.out.print("Name: ");
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String nameToUpdate = in.nextLine();
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System.out.print("Quantity: ");
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int quantityToUpdate = in.nextInt();
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System.out.print("Price: ");
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int priceToUpdate = in.nextInt();
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updateProduct(nameToUpdate, quantityToUpdate, priceToUpdate);
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break;
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case 4:
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System.out.print("Name of the product to delete: ");
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String nameToDelete = in.nextLine();
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deleteProduct(nameToDelete);
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break;
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case 5:
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listProducts();
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break;
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case 6:
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calculateTotalSales();
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break;
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case 7:
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System.out.print("Name of the product: ");
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String productName = in.nextLine();
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calculateProductSales(productName);
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break;
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case 8:
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deleteFile();
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break;
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}
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}
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in.close(); // Close the scanner to avoid resource leak
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}
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private static void createProduct(String name, int quantity, int price) throws IOException {
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File file = getFileBasedOnOs();
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try (PrintWriter printWriter = new PrintWriter(new FileWriter(file, true))) { // 'true' for appending to the file
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printWriter.print(name + ", ");
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printWriter.print(quantity + ", ");
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printWriter.println(price);
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} catch (IOException e) {
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e.printStackTrace();
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}
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System.out.println("Created successfully");
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}
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private static void consultProduct(String name) {
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File file = getFileBasedOnOs();
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
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String line;
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System.out.println(DIVLINE);
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while ((line = bufferedReader.readLine()) != null) {
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if (line.contains(name)) {
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System.out.println(line);
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break;
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}
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}
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System.out.println(DIVLINE);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private static void updateProduct(String name, int quantity, int price) {
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File file = getFileBasedOnOs();
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File tempFile = new File(file.getAbsolutePath() + ".tmp");
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boolean productFound = false;
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
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BufferedWriter bw = new BufferedWriter(new FileWriter(tempFile))) {
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String line;
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while ((line = bufferedReader.readLine()) != null) {
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if (!line.contains(name)) {
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bw.write(line);
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bw.newLine();
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} else {
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bw.write(name + ", ");
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bw.write(quantity + ", ");
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bw.write(price + "\n");
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System.out.println("Updated successfully");
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productFound = true;
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}
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}
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} catch (IOException e) {
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System.out.println(e.getClass().getName() + " Error processing the file " + e.getMessage());
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e.printStackTrace();
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}
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if (!productFound) {
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System.err.println("Product " + name + " does not exist in the file " + file.getName());
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tempFile.delete();
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return;
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}
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if (!file.delete()) {
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return;
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}
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if (!tempFile.renameTo(file)) {
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System.err.println(file.getName());
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}
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}
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private static void deleteProduct(String name) {
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File file = getFileBasedOnOs();
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File tempFile = new File(file.getAbsolutePath() + ".tmp");
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
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BufferedWriter bw = new BufferedWriter(new FileWriter(tempFile))) {
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String line;
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while ((line = bufferedReader.readLine()) != null) {
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if (!line.contains(name)) {
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bw.write(line);
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bw.newLine();
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}
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}
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} catch (IOException e) {
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System.out.println(e.getClass().getName() + " Error processing the file " + e.getMessage());
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e.printStackTrace();
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}
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if (!file.delete()) {
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return;
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}
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if (!tempFile.renameTo(file)) {
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System.err.println(file.getName());
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}
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}
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private static void listProducts() {
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File file = getFileBasedOnOs();
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
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String line;
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System.out.println(DIVLINE);
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while ((line = bufferedReader.readLine()) != null) {
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System.out.println(line);
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}
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System.out.println(DIVLINE);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private static void calculateTotalSales() {
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File file = getFileBasedOnOs();
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
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String line;
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int totalSales = 0;
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System.out.println(DIVLINE);
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while ((line = bufferedReader.readLine()) != null) {
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String[] parts = line.split(", ");
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int quantity = Integer.parseInt(parts[1]);
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int price = Integer.parseInt(parts[2]);
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totalSales += (quantity * price);
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}
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System.out.printf("Total sales: %d\n", totalSales);
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System.out.println(DIVLINE);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private static void calculateProductSales(String name) {
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File file = getFileBasedOnOs();
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try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file))) {
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String line;
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int totalSales = 0;
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System.out.println(DIVLINE);
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while ((line = bufferedReader.readLine()) != null) {
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if (line.contains(name)) {
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String[] parts = line.split(", ");
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int quantity = Integer.parseInt(parts[1]);
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int price = Integer.parseInt(parts[2]);
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totalSales += (quantity * price);
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break;
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}
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}
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System.out.printf("Total sales of %s = %d\n", name, totalSales);
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System.out.println(DIVLINE);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private static void deleteFile() {
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File file = getFileBasedOnOs();
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file.delete();
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}
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private static File getFileBasedOnOs() {
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String osName = System.getProperty("os.name").toLowerCase();
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File file;
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if (osName.contains("win")) {
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file = new File("J:\\JimsimroDev.txt");
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} else if (osName.contains("nix") || osName.contains("nux")) {
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file = new File("/mnt/j/JimsimroDev.txt");
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} else if (osName.contains("mac")) {
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file = new File("/mnt/j/JimsimroDev.txt");
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} else {
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file = new File("/mnt/j/JimsimroDev.txt"); // Operating system not recognized
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}
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return file;
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}
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public static void main(String[] args) throws IOException {
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actions();
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}
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}

‎Roadmap/13 - PRUEBAS UNITARIAS/java/JimsimroDev.java‎

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/*
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Installar JUnit para las pruebas unitarias en
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https://github.com/junit-team/junit4/wiki/Download-and-Install
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Se puede usar el .jar para proyectos creados con ant
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Para proyectos creados con Maven se puede usar el plugin
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13</version>
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<scope>test</scope>
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</dependency>
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Agregando esto a las dependencias del proyecto en el pom.xml
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*/
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package com.jimsimrodev;
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import java.util.Arrays;
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import java.util.Collection;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import java.time.LocalDate;
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import static java.time.format.DateTimeFormatter.ofPattern;
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import static com.jimsimrodev.Suma.suma;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertNotNull;
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import static java.time.format.DateTimeFormatter.ofPattern;
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import java.util.Arrays;
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import java.util.Collection;
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import java.time.LocalDate;
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/**
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* Suma
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*/
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public class Suma {
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public static double suma(double a, double b) {
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return a + b;
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}
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/**
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* @return
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*/
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public static Collection<String[]> data() {
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return Arrays.asList(
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new String[][] {
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{ "Name: ", "JimsimroDev" },
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{ "age: ", "28" },
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{ "birthDate: ", LocalDate.now().format(ofPattern("dd/MM/yyyy")) },
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{ "programinLenguages: ", "Java, Python, C++, C#" },
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});
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}
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public static void print(double resultado) {
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System.out.printf("La suma es: %s%n", resultado);
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}
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// Esta clase debe ir en el paquete de pruebas unitarias
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@RunWith(Parameterized.class)
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public class SumaTest {
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private final String key;
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private final String value;
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public SumaTest(String key, String value) {
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this.key = key;
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this.value = value;
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}
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@Test
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public void sumaTest() {
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// Para operaciones con decimales
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Assertions.assertEquals(6.0, suma(4.0, 2.0), 0.0001);
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assertEquals(-2.0, suma(5.0, -7.0), 0.0001);
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assertEquals(0.0, suma(0.0, 0.0), 0.0001);
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assertEquals(4.6, suma(2.5, 2.1), 0.0001);
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assertEquals(4.1, suma(2.1, 2.0), 0.0001);
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assertEquals(5.0, suma(2.5, 2.5), 0.0001);
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assertEquals(4.5, suma(2, 2.5), 0.0001);
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// assertEquals(5.0, suma("2.5", 2.5), 0.0001);//error
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}
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// Pruebas parametrizables
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@Parameterized.Parameters
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public static Collection<String[]> data() {
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return Arrays.asList(
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new String[][] {
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{ "name: ", "jimsimrodev" },
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{ "age: ", "28" },
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{ "birthDate: ", LocalDate.now().format(ofPattern("dd/MM/yyyy")) },
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{ "programinlenguages: ", "java, python, c++, c#" },
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});
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}
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@Test
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public void testfieldsexist() {
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assertNotNull("La clave no debe ser nula", key);
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assertFalse("La clave no debe estar vacía", key.trim().isEmpty());
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assertNotNull("El valor no debe ser nulo", value);
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assertFalse("El valor no debe estar vacío", value.trim().isEmpty());
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}
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}
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public static void main(String[] args) {
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print(suma(4, 2));
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print(suma(-4.0, 2.0));
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for (String[] data : data()) {
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for (String string : data) {
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System.out.print(string);
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}
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System.out.println(" ");
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}
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}
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}

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