pig-latin: convert to use instance methods

exercises/pig-latin/src/example/java/PigLatin.java → exercises/pig-latin/src/example/java/PigLatinTranslator.java

 import java.util.List;
 import java.util.stream.Collectors;
 
-public class PigLatin {
+public class PigLatinTranslator {
 
     public static final String AY = "ay";
     public static final String THR = "thr";
     public static final String YT = "yt";
     public static final String VOWELS_REGEX = "[aeiou]";
 
-    public static String translate(String sentence) {
+    public String translate(String sentence) {
         List<String> translatedWords = Arrays.asList(sentence.split(" "))
                 .stream()
                 .map(x -> translateWord(x))
         return String.join(" ", translatedWords);
     }
 
-    private static String translateWord(String word) {
+    private String translateWord(String word) {
         if (wordStartsWithVowelLike(word)) {
             return word + AY;
         }
         return word.substring(1) + word.toCharArray()[0] + AY;
     }
 
-    private static boolean wordStartsWithVowelLike(String word) {
+    private boolean wordStartsWithVowelLike(String word) {
         return word.startsWith(YT) || word.startsWith(XR) || word.substring(0, 1).matches(VOWELS_REGEX);
     }
 
-    private static boolean wordStartsWithPrefixes(String word, String... prefixes) {
-        return Arrays.asList(prefixes).stream()
-                .anyMatch(x -> word.startsWith(x));
+    private boolean wordStartsWithPrefixes(String word, String... prefixes) {
+        return Arrays.stream(prefixes)
+                .anyMatch(word::startsWith);
     }
 
-    private static boolean wordStartsWithConsonantAndQu(String word) {
+    private boolean wordStartsWithConsonantAndQu(String word) {
         return word.substring(1).startsWith(QU);
     }
 }

exercises/pig-latin/src/test/java/PigLatinTest.java → exercises/pig-latin/src/test/java/PigLatinTranslatorTest.java

 import org.junit.Test;
-import org.junit.Ignore;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
 import static org.junit.Assert.assertEquals;
 
 @RunWith(Parameterized.class)
-public class PigLatinTest {
+public class PigLatinTranslatorTest {
 
     private String englishPhrase;
     private String pigLatinTranslation;
         });
     }
 
-    public PigLatinTest(String englishPhrase, String pigLatinTranslation) {
+    public PigLatinTranslatorTest(String englishPhrase, String pigLatinTranslation) {
         this.englishPhrase = englishPhrase;
         this.pigLatinTranslation = pigLatinTranslation;
     }
 
-
     @Test
     public void test() {
-        assertEquals(pigLatinTranslation, PigLatin.translate(englishPhrase));
+        assertEquals(pigLatinTranslation, new PigLatinTranslator().translate(englishPhrase));
     }
+
 }