Java 11 migration: ambassador async-method-invocation balking bridge builder (#1076)

* Moves ambassador pattern to java 11

* Moves async-method-invocation pattern  to java 11

* Moves balking pattern  to java 11

* Moves bridge pattern  to java 11

* Moves builder pattern  to java 11

builder/src/main/java/com/iluwatar/builder/App.java

@@ -59,20 +59,22 @@ public class App {
    */
   public static void main(String[] args) {
 
-    Hero mage =
-        new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK)
-            .withWeapon(Weapon.DAGGER).build();
+    var mage = new Hero.Builder(Profession.MAGE, "Riobard")
+        .withHairColor(HairColor.BLACK)
+        .withWeapon(Weapon.DAGGER)
+        .build();
     LOGGER.info(mage.toString());
 
-    Hero warrior =
-        new Hero.Builder(Profession.WARRIOR, "Amberjill").withHairColor(HairColor.BLOND)
-            .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD)
-            .build();
+    var warrior = new Hero.Builder(Profession.WARRIOR, "Amberjill")
+        .withHairColor(HairColor.BLOND)
+        .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD)
+        .build();
     LOGGER.info(warrior.toString());
 
-    Hero thief =
-        new Hero.Builder(Profession.THIEF, "Desmond").withHairType(HairType.BALD)
-            .withWeapon(Weapon.BOW).build();
+    var thief = new Hero.Builder(Profession.THIEF, "Desmond")
+        .withHairType(HairType.BALD)
+        .withWeapon(Weapon.BOW)
+        .build();
     LOGGER.info(thief.toString());
 
   }

builder/src/main/java/com/iluwatar/builder/Armor.java

@@ -30,7 +30,7 @@ public enum Armor {
 
   CLOTHES("clothes"), LEATHER("leather"), CHAIN_MAIL("chain mail"), PLATE_MAIL("plate mail");
 
-  private String title;
+  private final String title;
 
   Armor(String title) {
     this.title = title;

builder/src/main/java/com/iluwatar/builder/HairType.java

@@ -31,7 +31,7 @@ public enum HairType {
   BALD("bald"), SHORT("short"), CURLY("curly"), LONG_STRAIGHT("long straight"), LONG_CURLY(
       "long curly");
 
-  private String title;
+  private final String title;
 
   HairType(String title) {
     this.title = title;

builder/src/main/java/com/iluwatar/builder/Hero.java

@@ -71,7 +71,7 @@ public final class Hero {
   @Override
   public String toString() {
 
-    StringBuilder sb = new StringBuilder();
+    var sb = new StringBuilder();
     sb.append("This is a ")
         .append(profession)
         .append(" named ")

builder/src/test/java/com/iluwatar/builder/AppTest.java

@@ -26,15 +26,11 @@ package com.iluwatar.builder;
 import org.junit.jupiter.api.Test;
 
 /**
- * 
  * Application test
- *
  */
-public class AppTest {
-
+class AppTest {
   @Test
-  public void test() {
-    String[] args = {};
-    App.main(args);
+  void test() {
+    App.main(new String[]{});
   }
 }

builder/src/test/java/com/iluwatar/builder/HeroTest.java

@@ -23,24 +23,24 @@
 
 package com.iluwatar.builder;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * Date: 12/6/15 - 11:01 PM
  *
  * @author Jeroen Meulemeester
  */
-public class HeroTest {
+class HeroTest {
 
   /**
    * Test if we get the expected exception when trying to create a hero without a profession
    */
   @Test
-  public void testMissingProfession() throws Exception {
+  void testMissingProfession() {
     assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(null, "Sir without a job"));
   }
 
@@ -48,7 +48,7 @@ public class HeroTest {
    * Test if we get the expected exception when trying to create a hero without a name
    */
   @Test
-  public void testMissingName() throws Exception {
+  void testMissingName() {
     assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(Profession.THIEF, null));
   }
 
@@ -56,10 +56,10 @@ public class HeroTest {
    * Test if the hero build by the builder has the correct attributes, as requested
    */
   @Test
-  public void testBuildHero() throws Exception {
+  void testBuildHero() {
     final String heroName = "Sir Lancelot";
 
-    final Hero hero = new Hero.Builder(Profession.WARRIOR, heroName)
+    final var hero = new Hero.Builder(Profession.WARRIOR, heroName)
         .withArmor(Armor.CHAIN_MAIL)
         .withWeapon(Weapon.SWORD)
         .withHairType(HairType.LONG_CURLY)