Java 11 migrate remaining p (#1122)

* Moves partial-response to Java 11

* Moves pipeline to Java 11

* Moves poison-pill to Java 11

* Moves priority-queue to Java 11

* Moves private-class-data to Java 11

* Moves producer-consumer to Java 11

* Moves promise to Java 11

* Moves property to Java 11

* Moves prototype to Java 11

* Moves proxy to Java 11

* Corrects checkstyle errors

* Fixes build for pipeline pattern

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

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

property/src/test/java/com/iluwatar/property/CharacterTest.java

@@ -23,14 +23,15 @@
 
 package com.iluwatar.property;
 
-import org.junit.jupiter.api.Test;
-
 import static com.iluwatar.property.Character.Type;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.util.Arrays;
+import org.junit.jupiter.api.Test;
+
 /**
  * Date: 12/28/15 - 7:46 PM
  *
@@ -40,13 +41,13 @@ public class CharacterTest {
 
   @Test
   public void testPrototypeStats() throws Exception {
-    final Character prototype = new Character();
+    final var prototype = new Character();
 
-    for (final Stats stat : Stats.values()) {
+    for (final var stat : Stats.values()) {
       assertFalse(prototype.has(stat));
       assertNull(prototype.get(stat));
 
-      final Integer expectedValue = stat.ordinal();
+      final var expectedValue = stat.ordinal();
       prototype.set(stat, expectedValue);
       assertTrue(prototype.has(stat));
       assertEquals(expectedValue, prototype.get(stat));
@@ -59,15 +60,13 @@ public class CharacterTest {
   }
 
   @Test
-  public void testCharacterStats() throws Exception {
-    final Character prototype = new Character();
-    for (final Stats stat : Stats.values()) {
-      prototype.set(stat, stat.ordinal());
-    }
+  public void testCharacterStats() {
+    final var prototype = new Character();
+    Arrays.stream(Stats.values()).forEach(stat -> prototype.set(stat, stat.ordinal()));
 
-    final Character mage = new Character(Type.MAGE, prototype);
-    for (final Stats stat : Stats.values()) {
-      final Integer expectedValue = stat.ordinal();
+    final var mage = new Character(Type.MAGE, prototype);
+    for (final var stat : Stats.values()) {
+      final var expectedValue = stat.ordinal();
       assertTrue(mage.has(stat));
       assertEquals(expectedValue, mage.get(stat));
     }
@@ -75,17 +74,17 @@ public class CharacterTest {
 
   @Test
   public void testToString() {
-    final Character prototype = new Character();
+    final var prototype = new Character();
     prototype.set(Stats.ARMOR, 1);
     prototype.set(Stats.AGILITY, 2);
     prototype.set(Stats.INTELLECT, 3);
     assertEquals("Stats:\n - AGILITY:2\n - ARMOR:1\n - INTELLECT:3\n", prototype.toString());
 
-    final Character stupid = new Character(Type.ROGUE, prototype);
+    final var stupid = new Character(Type.ROGUE, prototype);
     stupid.remove(Stats.INTELLECT);
     assertEquals("Character type: ROGUE\nStats:\n - AGILITY:2\n - ARMOR:1\n", stupid.toString());
 
-    final Character weak = new Character("weak", prototype);
+    final var weak = new Character("weak", prototype);
     weak.remove(Stats.ARMOR);
     assertEquals("Player: weak\nStats:\n - AGILITY:2\n - INTELLECT:3\n", weak.toString());
 
@@ -93,32 +92,32 @@ public class CharacterTest {
 
   @Test
   public void testName() {
-    final Character prototype = new Character();
+    final var prototype = new Character();
     prototype.set(Stats.ARMOR, 1);
     prototype.set(Stats.INTELLECT, 2);
     assertNull(prototype.name());
 
-    final Character stupid = new Character(Type.ROGUE, prototype);
+    final var stupid = new Character(Type.ROGUE, prototype);
     stupid.remove(Stats.INTELLECT);
     assertNull(stupid.name());
 
-    final Character weak = new Character("weak", prototype);
+    final var weak = new Character("weak", prototype);
     weak.remove(Stats.ARMOR);
     assertEquals("weak", weak.name());
   }
 
   @Test
   public void testType() {
-    final Character prototype = new Character();
+    final var prototype = new Character();
     prototype.set(Stats.ARMOR, 1);
     prototype.set(Stats.INTELLECT, 2);
     assertNull(prototype.type());
 
-    final Character stupid = new Character(Type.ROGUE, prototype);
+    final var stupid = new Character(Type.ROGUE, prototype);
     stupid.remove(Stats.INTELLECT);
     assertEquals(Type.ROGUE, stupid.type());
 
-    final Character weak = new Character("weak", prototype);
+    final var weak = new Character("weak", prototype);
     weak.remove(Stats.ARMOR);
     assertNull(weak.type());
   }