Merge pull request mouredev#3743 from worlion/worlion/java/ejercicio10

#10 - Java

Author: kontroldev

Roadmap/10 - EXCEPCIONES/java/Worlion.java

@@ -0,0 +1,105 @@
+import java.util.Arrays;
+import java.util.List;
+
+public class Worlion {
+    
+
+    public static final String GREEN = "\u001B[32m";
+    public static final String RED = "\u001B[31m";
+    public static final String RED_BACKGROUND = "\u001B[41m";
+    public static final String ANSI_RESET = "\u001B[0m";
+
+    public static void main(String[] args) {
+        new Worlion().run();
+    }
+
+    public void run() {
+        System.out.println("Resultado obtenido: "+div(7, 0));
+
+        testArray();
+
+        testExtra();
+        
+    }
+/*
+ * EJERCICIO: Excepciones en Java
+ */
+
+    public int div(int a, int b) {
+        System.out.println("\nDividimos "+a+" entre "+ b+":");
+        int result = 0;
+        try {
+            result = a/b;
+        } catch (ArithmeticException e) {
+            System.err.println(RED +"ERROR:"+ ANSI_RESET+" You can not divide by 0");
+        }
+        return result;
+    }
+
+    public void testArray() {
+        List<String> list = Arrays.asList(new String[]{"A", "B", "C"});
+        System.out.println("\nRecorremos la lista "+list);
+        try{
+            for(int i = 0; i <= list.size(); i++) {
+                System.out.println("Position: "+i+" - Value: "+list.get(i));
+            }
+        }
+        catch (ArrayIndexOutOfBoundsException e) {
+            System.err.println(RED +"ERROR:"+ ANSI_RESET + e);
+        }
+        System.out.println("Chimpun!");
+    }
+
+/* DIFICULTAD EXTRA (opcional):
+ */
+
+        class myCustomException extends Exception {
+        public myCustomException(String errorMessage) {
+            super(errorMessage);
+        }
+    }
+
+    private boolean isVocal(char c){
+        return c == 'a' ||c == 'e' ||c == 'i' ||c == 'o' ||c == 'u';
+    }
+
+    private char exceptionsFunction(String s, int num) throws Exception {
+    
+
+        if(s.isEmpty()){
+            throw new myCustomException("The string must be not empty");
+        }
+        char c =  s.charAt(num);
+        if(isVocal(c)){
+            throw new Exception("Odio las vocales!!");
+        }
+        return s.charAt(num);
+    }
+
+    private void testExtra() {
+        System.out.println(" \n ---- 🌩 DIFICULTAD EXTRA 🌩 ----\n");
+
+        String[] strings = {"","patata", "carcamusa", "ascapatipucyuelaimepipedo", "choripan"};
+        int[] indexes = {2,-1,20, 11, 2};
+        int errorCount = 0;
+
+        for (int i = 0; i < strings.length; i++) {
+            try {
+                System.out.println("Word: " + strings[i] + " - Index: "+ indexes[i] + " - CharAt: "+exceptionsFunction(strings[i], indexes[i]));
+            }
+            catch (myCustomException e){
+                System.err.println(RED +"ERROR - MY CUSTOM EXCEPTION: "+ ANSI_RESET + e);
+                errorCount++;
+            } 
+            catch (StringIndexOutOfBoundsException e){
+                System.err.println(RED +"ERROR - NOS HEMOS SALIDO :(: "+ ANSI_RESET + e);
+                errorCount++;
+            } 
+            catch (Exception e) {
+                System.err.println(RED +"ERROR - OTRAS: "+ ANSI_RESET + e);
+                errorCount++;
+            }
+        }
+        System.out.println("Ejecución terminada. Se han producido (y recuperado) "+errorCount+" errores");
+    }
+}