vowels

src/main/java/rocks/zipcode/io/quiz3/arrays/WaveGenerator.java

  */
 public class WaveGenerator {
     public static String[] wave(String str) {
+
+
+
+
+
         return null;
     }
 }

src/main/java/rocks/zipcode/io/quiz3/fundamentals/VowelUtils.java

  */
 public class VowelUtils {
     public static Boolean hasVowels(String word) {
-        return null;
+         char [] chars = word.toCharArray();
+
+        for(int i=0;i <word.length();i++){
+            if(isVowel(chars[i])){
+
+
+                return true;
+            }
+
+
+        }
+
+        return false;
     }
 
     public static Integer getIndexOfFirstVowel(String word) {
-        return null;
+        char [] chars = word.toCharArray();
+        Integer result = null;
+        for ( int i =0 ; i <chars.length ; i++) {
+
+            if (isVowel(chars[i])){
+
+                result = i;
+                break;
+            }
+
+        }
+
+
+        return result ;
     }
 
 
     public static Boolean startsWithVowel(String word) {
-        return null;
+
+            if((word.charAt(0) == 'A' ||
+                    (word.charAt(0) == 'E')  ||
+                    (word.charAt(0) == 'I') ||
+                    (word.charAt(0) == 'O') ||
+                    (word.charAt(0) == 'U'))){
+                return true;
+            }
+
+        return false;
     }
 
     public static Boolean isVowel(Character character) {
-        return null;
+
+
+        if((Character.toLowerCase(character) == 'a') ||
+                (Character.toLowerCase(character )== 'e')  ||
+                (Character.toLowerCase(character) == 'i') ||
+                (Character.toLowerCase(character) == 'o') ||
+                ( Character.toLowerCase(character)  == 'u')) {
+            return true;
+        }
+
+return false;
+
     }
 }

src/main/java/rocks/zipcode/io/quiz3/generics/ArrayUtility.java

 package rocks.zipcode.io.quiz3.generics;
 
 import java.util.function.Function;
-import java.util.stream.Collectors;
+
 
 /**
  * @author leon on 09/12/2018.

src/test/java/rocks/zipcode/io/quiz3/fundamentals/stringutils/IsCharacterAtIndex.java

         Integer index = 0;
 
         // then
-        Assert.assertTrue(StringUtils.isCharacterAtIndex(string, character, index));
+        Assert.assertFalse(StringUtils.isCharacterAtIndex(string, character, index));
     }
 
     @Test
         Integer index = 0;
 
         // then
-        Assert.assertFalse(StringUtils.isCharacterAtIndex(string, character, index));
+        Assert.assertTrue(StringUtils.isCharacterAtIndex(string, character, index));
     }