Merge pull request #4943 from jorgenavarroenamoradotokio/main

Retos #23, #24, #25, #26, #27, #28, #29 Java

Retos/Reto #23 - LA BASE DE DATOS [Media]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,36 @@
+package com.retos.ej23;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class jorgenavarroenamoradotokio {
+
+	private static final String DB_URL = "jdbc:mysql://mysql-5707.dinaserver.com:3306/moure_test";
+	private static final String DB_USER = "mouredev_read";
+	private static final String DB_PASSWORD = "mouredev_pass";
+
+	public static void main(String[] args) {
+
+		try {
+			Class.forName("com.mysql.cj.jdbc.Driver");
+			Connection conexion = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);
+
+			String strSql = "SELECT COUNT(*) as total FROM challenges";
+			Statement statement = conexion.createStatement();
+			ResultSet rs = statement.executeQuery(strSql);
+
+			if (rs.next()) {
+				System.out.println(rs.getString("total"));
+			}
+
+			rs.close();
+            statement.close();
+            conexion.close();
+		} catch (ClassNotFoundException | SQLException e) {
+			e.printStackTrace();
+		}
+	}
+}

Retos/Reto #24 - CIFRADO CÉSAR [Fácil]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,40 @@
+package com.retos.ej24;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class jorgenavarroenamoradotokio {
+
+	public static void main(String[] args) {
+		caesarCipher("Mi nombre es MoureDev.", false, 3);
+		caesarCipher("ol proeuh hv orxuhghy.", true, 3);
+		caesarCipher("Mi nombre es MoureDev.", false, 5);
+		caesarCipher("qn rtqgwj jx qtzwjija.", true, 5);
+	}
+
+	public static void caesarCipher(String text, boolean decrypt, int shift) {
+		String alphabet = "abcdefghijklmnopqrstuvwxyz";
+		List<Character> charList = new ArrayList<>();
+		for (char c : alphabet.toCharArray()) {
+			charList.add(c);
+		}
+		charList.add(charList.indexOf('n') + 1, 'ñ');
+
+		StringBuilder caesarText = new StringBuilder();
+
+		text = text.toLowerCase();
+
+		for (char value : text.toCharArray()) {
+			if (charList.contains(value)) {
+				int index = (charList.indexOf(value) + (decrypt ? -shift : shift)) % charList.size();
+				if (index < 0) {
+					index += charList.size();
+				}
+				caesarText.append(charList.get(index));
+			} else {
+				caesarText.append(value);
+			}
+		}
+		System.out.println(caesarText.toString());
+	}
+}

Retos/Reto #25 - EL CÓDIGO KONAMI [Media]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,64 @@
+package com.retos.ej25;
+
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+
+import javax.swing.JFrame;
+
+public class jorgenavarroenamoradotokio {
+
+	private static final int[] KONAMI_CODE = { KeyEvent.VK_UP, KeyEvent.VK_UP, KeyEvent.VK_DOWN, KeyEvent.VK_DOWN,
+			KeyEvent.VK_LEFT, KeyEvent.VK_RIGHT, KeyEvent.VK_LEFT, KeyEvent.VK_RIGHT, KeyEvent.VK_B, KeyEvent.VK_A };
+
+	private static int keyPosition = 0;
+	private static int lastKey = KeyEvent.VK_ESCAPE;
+
+	public static void main(String[] args) {
+		JFrame frame = new JFrame("Konami Code Detector");
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.addKeyListener(new KeyListener() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+				// No se utiliza en este ejemplo
+			}
+
+			@Override
+			public void keyPressed(KeyEvent e) {
+				int key = e.getKeyCode();
+
+				if (key == KeyEvent.VK_ESCAPE) {
+					System.out.println("Exit");
+					System.exit(0);
+				}
+
+				if (key == KONAMI_CODE[keyPosition]) {
+					keyPosition++;
+				} else if (key == KONAMI_CODE[0]) {
+					if (lastKey == KONAMI_CODE[0]) {
+						keyPosition = 2;
+					} else {
+						keyPosition = 1;
+					}
+				} else {
+					keyPosition = 0;
+				}
+
+				if (keyPosition == KONAMI_CODE.length) {
+					System.out.println("\n" + "╦╔═╔═╗╔╗╔╔═╗╔╦╗╦  ╔═╗╔═╗╔╦╗╔═╗\n" + "╠╩╗║ ║║║║╠═╣║║║║  ║  ║ ║ ║║║║╣\n"
+							+ "╩ ╩╚═╝╝╚╝╩ ╩╩ ╩╩  ╚═╝╚═╝═╩╝╚═╝\n" + "\n");
+					System.exit(0);
+				}
+
+				lastKey = key;
+			}
+
+			@Override
+			public void keyReleased(KeyEvent e) {
+				// No se utiliza en este ejemplo
+			}
+		});
+
+		frame.setSize(200, 200);
+		frame.setVisible(true);
+	}
+}

Retos/Reto #26 - TESTING [Media]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,38 @@
+package com.retos.ej26;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.time.DayOfWeek;
+import java.time.LocalDate;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class jorgenavarroenamoradotokio {
+
+	@Test
+	void whenDiaNoEsViernes() {
+		assertFalse(existeViernesTreceLocalDate(9, 2023));
+	}
+
+	@Test
+	void whenDiaEsViernes() {
+		assertTrue(existeViernesTreceLocalDate(1, 2023));
+	}
+
+	@Test
+	void whenDiaEsCero() {
+		Exception thrown = Assertions.assertThrows(Exception.class, () -> {
+			existeViernesTreceLocalDate(0, 2023);
+		}, "Exception was expected");
+
+		Assertions.assertEquals("Invalid value for MonthOfYear (valid values 1 - 12): 0", thrown.getMessage());
+	}
+
+	private boolean existeViernesTreceLocalDate(int mes, int anio) {
+		LocalDate localDate = LocalDate.of(anio, mes, 13);
+		return localDate.getDayOfWeek() == DayOfWeek.FRIDAY;
+	}
+
+}

Retos/Reto #27 - CUENTA ATRÁS [Media]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,29 @@
+package com.retos.ej27;
+
+public class jorgenavarroenamoradotokio {
+
+	public static void main(String[] args) {
+		countdown(10, 1);
+	}
+
+	private static void countdown(int start, int interval) {
+		if (start <= 0 || interval <= 0) {
+			System.out.println("Los parámetros deben ser números enteros positivos.");
+			return;
+		}
+
+		for (; start >= 0;start = switch (start) {
+		case 0 -> -1;
+		default -> {
+			System.out.println(start);
+			yield start - 1;
+		}
+		}) {
+			try {
+				Thread.sleep(interval * 1000);
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+}

Retos/Reto #28 - EXPRESIÓN MATEMÁTICA [Media]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,42 @@
+package com.retos.ej28;
+
+public class jorgenavarroenamoradotokio {
+
+	public static void main(String[] args) {
+		System.out.println(checkMathExp("3 + 5"));
+		System.out.println(checkMathExp("3 a 5"));
+		System.out.println(checkMathExp("-3 + 5"));
+		System.out.println(checkMathExp("- 3 + 5"));
+		System.out.println(checkMathExp("-3 a 5"));
+		System.out.println(checkMathExp("-3+5"));
+		System.out.println(checkMathExp("3 + 5 - 1 / 4 % 8"));
+	}
+
+	private static boolean checkMathExp(String expression) {
+		String[] components = expression.split(" ");
+
+		if (components.length < 3 || components.length % 2 == 0) {
+			return false;
+		}
+
+		boolean check = true;
+		for (int index = 0; index < components.length; index++) {
+			String component = components[index];
+			if (index % 2 == 0) {
+				try {
+					Double.parseDouble(component);
+				} catch (NumberFormatException e) {
+					check = false;
+				}
+			} else {
+				check = "+".equals(component) || "-".equals(component) || "*".equals(component) || "/".equals(component)
+						|| "%".equals(component);
+			}
+
+			if (!check) {
+				return false;
+			}
+		}
+		return check;
+	}
+}

Retos/Reto #29 - EL CARÁCTER INFILTRADO [Fácil]/java/jorgenavarroenamoradotokio.java

@@ -0,0 +1,28 @@
+package com.retos.ej29;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class jorgenavarroenamoradotokio {
+
+	public static void main(String[] args) {
+		System.out.println(infiltratedCharacters("Me llamo mouredev", "Me llemo mouredov"));
+		System.out.println(infiltratedCharacters("Me llamo.Brais Moure", "Me llamo brais moure"));
+		System.out.println(infiltratedCharacters("Me llamo.Brais Moure", "Me llamo brais moure "));
+		System.out.println(infiltratedCharacters("", ""));
+	}
+
+	private static List<Character> infiltratedCharacters(String firstText, String secondText) {
+		List<Character> characters = new ArrayList<>();
+
+		if (firstText.length() == secondText.length()) {
+			for (int index = 0; index < firstText.length(); index++) {
+				if (firstText.charAt(index) != secondText.charAt(index)) {
+					characters.add(secondText.charAt(index));
+				}
+			}
+		}
+
+		return characters;
+	}
+}