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

double-buffer/src/main/java/com/iluwatar/doublebuffer/FrameBuffer.java

@@ -23,6 +23,8 @@
 
 package com.iluwatar.doublebuffer;
 
+import java.util.Arrays;
+
 /**
  * FrameBuffer implementation class.
  */
@@ -49,9 +51,7 @@ public class FrameBuffer implements Buffer {
 
   @Override
   public void clearAll() {
-    for (var i = 0; i < pixels.length; ++i) {
-      pixels[i] = Pixel.WHITE;
-    }
+    Arrays.fill(pixels, Pixel.WHITE);
   }
 
   @Override