Merge pull request mouredev#6830 from h4ckxel/h4ckxel-2

"#16 - Java"

Author: Roswell468

Roadmap/16 - EXPRESIONES REGULARES/java/h4ckxel.java

@@ -0,0 +1,41 @@
+/*
+    * #16 EXPRESIONES REGULARES
+*/
+import java.util.regex.*;
+
+public class Main {
+    public static void main(String[] args) {
+        String texto = "Este texto contiene 5 numeros del 1 al 5: 1,2,3,4,5";
+        String regexNumeros = "\\d+";
+        Pattern pattern = Pattern.compile(regexNumeros);
+        Matcher matcher = pattern.matcher(texto);
+        while (matcher.find()) {
+            System.out.println(matcher.group());
+        }
+        System.out.println("------------------");
+        /*
+         * DIFICULTAD EXTRA 
+        */
+
+        String emailCorrecto = "[email protected]";
+        String emailIncorrecto = "abcmail.com";
+        String regexEmail = "^[a-zA-Z0-9._+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$";
+
+        System.out.println(emailCorrecto + " es un email valido? " + emailCorrecto.matches(regexEmail));
+        System.out.println(emailIncorrecto + " es un email valido? " + emailIncorrecto.matches(regexEmail));
+
+        String numeroCorrecto = "+51 987654321";
+        String numeroIncorrecto = "987654321";
+        String regexNumero = "^\\+[0-9]{2}\\s[0-9]{9}$";
+
+        System.out.println(numeroCorrecto + " es un numero valido? " + numeroCorrecto.matches(regexNumero));
+        System.out.println(numeroIncorrecto + " es un numero valido? " + numeroIncorrecto.matches(regexNumero));
+
+        String urlCorrecta = "https://retosdeprogramacion.com";
+        String urlIncorrecta = "retosdeprogramacion.com/";
+        String regexUrl = "^https?://(www\\.)?[a-zA-Z0-9-]+\\.[a-zA-Z]{2,}$";
+
+        System.out.println(urlCorrecta + " es una url valida? " + urlCorrecta.matches(regexUrl));
+        System.out.println(urlIncorrecta + " es una url valida? " + urlIncorrecta.matches(regexUrl));
+    }
+}