Java 11 migrate c-d (remaining) (#1111)

* Moves converter pattern to Java 11

* Moves cqrs pattern to Java 11

* Moves dao pattern to Java 11

* Moves data-bus pattern to Java 11

* Moves data-locality pattern to Java 11

* Moves data-mapper pattern to Java 11

* Moves data-transfer-object pattern to Java 11

* Moves decorator pattern to Java 11

* Moves delegation pattern to Java 11

* Moves dependency-injection to Java 11

* Moves dirty-flag to Java 11

* Moves double-buffer to Java 11

* Moves double-checked-locking to Java 11

* Moves double-dispatch to Java 11

* Corrects with changes thats breaking test cases

decorator/README.md

@@ -98,12 +98,12 @@ Here's the troll in action
 
 ```java
 // simple troll
-Troll troll = new SimpleTroll();
+var troll = new SimpleTroll();
 troll.attack(); // The troll tries to grab you!
 troll.fleeBattle(); // The troll shrieks in horror and runs away!
 
 // change the behavior of the simple troll by adding a decorator
-Troll clubbedTroll = new ClubbedTroll(troll);
+var clubbedTroll = new ClubbedTroll(troll);
 clubbedTroll.attack(); // The troll tries to grab you! The troll swings at you with a club!
 clubbedTroll.fleeBattle(); // The troll shrieks in horror and runs away!
 ```

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

@@ -49,14 +49,14 @@ public class App {
 
     // simple troll
     LOGGER.info("A simple looking troll approaches.");
-    Troll troll = new SimpleTroll();
+    var troll = new SimpleTroll();
     troll.attack();
     troll.fleeBattle();
     LOGGER.info("Simple troll power {}.\n", troll.getAttackPower());
 
     // change the behavior of the simple troll by adding a decorator
     LOGGER.info("A troll with huge club surprises you.");
-    Troll clubbedTroll = new ClubbedTroll(troll);
+    var clubbedTroll = new ClubbedTroll(troll);
     clubbedTroll.attack();
     clubbedTroll.fleeBattle();
     LOGGER.info("Clubbed troll power {}.\n", clubbedTroll.getAttackPower());

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

@@ -26,15 +26,12 @@ package com.iluwatar.decorator;
 import org.junit.jupiter.api.Test;
 
 /**
- * 
  * Application test
- *
  */
 public class AppTest {
 
   @Test
   public void test() {
-    String[] args = {};
-    App.main(args);
+    App.main(new String[]{});
   }
 }

decorator/src/test/java/com/iluwatar/decorator/ClubbedTrollTest.java

@@ -23,14 +23,14 @@
 
 package com.iluwatar.decorator;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.internal.verification.VerificationModeFactory.times;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * Tests for {@link ClubbedTroll}
  */
@@ -39,10 +39,10 @@ public class ClubbedTrollTest {
   @Test
   public void testClubbedTroll() {
     // Create a normal troll first, but make sure we can spy on it later on.
-    final Troll simpleTroll = spy(new SimpleTroll());
+    final var simpleTroll = spy(new SimpleTroll());
 
     // Now we want to decorate the troll to make it stronger ...
-    final Troll clubbed = new ClubbedTroll(simpleTroll);
+    final var clubbed = new ClubbedTroll(simpleTroll);
     assertEquals(20, clubbed.getAttackPower());
     verify(simpleTroll, times(1)).getAttackPower();
 

decorator/src/test/java/com/iluwatar/decorator/SimpleTrollTest.java

@@ -23,19 +23,18 @@
 
 package com.iluwatar.decorator;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
+import java.util.LinkedList;
+import java.util.List;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.slf4j.LoggerFactory;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
 /**
  * Tests for {@link SimpleTroll}
  */
@@ -55,7 +54,7 @@ public class SimpleTrollTest {
 
   @Test
   public void testTrollActions() {
-    final SimpleTroll troll = new SimpleTroll();
+    final var troll = new SimpleTroll();
     assertEquals(10, troll.getAttackPower());
 
     troll.attack();