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

proxy/README.md

@@ -100,7 +100,7 @@ public class WizardTowerProxy implements WizardTower {
 And here is tower entering scenario
 
 ```java
-WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower());
+var proxy = new WizardTowerProxy(new IvoryTower());
 proxy.enter(new Wizard("Red wizard")); // Red wizard enters the tower.
 proxy.enter(new Wizard("White wizard")); // White wizard enters the tower.
 proxy.enter(new Wizard("Black wizard")); // Black wizard enters the tower.

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

@@ -44,7 +44,7 @@ public class App {
    */
   public static void main(String[] args) {
 
-    WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower());
+    var proxy = new WizardTowerProxy(new IvoryTower());
     proxy.enter(new Wizard("Red wizard"));
     proxy.enter(new Wizard("White wizard"));
     proxy.enter(new Wizard("Black wizard"));

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

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

proxy/src/test/java/com/iluwatar/proxy/IvoryTowerTest.java

@@ -23,14 +23,15 @@
 
 package com.iluwatar.proxy;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 import com.iluwatar.proxy.utils.InMemoryAppender;
+import java.util.List;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 /**
  * Tests for {@link IvoryTower}
  */
@@ -49,18 +50,16 @@ public class IvoryTowerTest {
   }
 
   @Test
-  public void testEnter() throws Exception {
-    final Wizard[] wizards = new Wizard[]{
+  public void testEnter() {
+    final var wizards = List.of(
         new Wizard("Gandalf"),
         new Wizard("Dumbledore"),
         new Wizard("Oz"),
         new Wizard("Merlin")
-    };
+    );
 
-    IvoryTower tower = new IvoryTower();
-    for (Wizard wizard : wizards) {
-      tower.enter(wizard);
-    }
+    var tower = new IvoryTower();
+    wizards.forEach(tower::enter);
 
     assertTrue(appender.logContains("Gandalf enters the tower."));
     assertTrue(appender.logContains("Dumbledore enters the tower."));

proxy/src/test/java/com/iluwatar/proxy/WizardTest.java

@@ -23,20 +23,19 @@
 
 package com.iluwatar.proxy;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
 /**
  * Tests for {@link Wizard}
  */
 public class WizardTest {
 
   @Test
-  public void testToString() throws Exception {
-    final String[] wizardNames = {"Gandalf", "Dumbledore", "Oz", "Merlin"};
-    for (String name : wizardNames) {
-      assertEquals(name, new Wizard(name).toString());
-    }
+  public void testToString() {
+    List.of("Gandalf", "Dumbledore", "Oz", "Merlin")
+        .forEach(name -> assertEquals(name, new Wizard(name).toString()));
   }
 }

proxy/src/test/java/com/iluwatar/proxy/WizardTowerProxyTest.java

@@ -23,14 +23,15 @@
 
 package com.iluwatar.proxy;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 import com.iluwatar.proxy.utils.InMemoryAppender;
+import java.util.List;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 /**
  * Tests for {@link WizardTowerProxy}
  */
@@ -50,17 +51,15 @@ public class WizardTowerProxyTest {
 
   @Test
   public void testEnter() throws Exception {
-    final Wizard[] wizards = new Wizard[]{
+    final var wizards = List.of(
         new Wizard("Gandalf"),
         new Wizard("Dumbledore"),
         new Wizard("Oz"),
         new Wizard("Merlin")
-    };
+    );
 
-    final WizardTowerProxy proxy = new WizardTowerProxy(new IvoryTower());
-    for (Wizard wizard : wizards) {
-      proxy.enter(wizard);
-    }
+    final var proxy = new WizardTowerProxy(new IvoryTower());
+    wizards.forEach(proxy::enter);
 
     assertTrue(appender.logContains("Gandalf enters the tower."));
     assertTrue(appender.logContains("Dumbledore enters the tower."));

proxy/src/test/java/com/iluwatar/proxy/utils/InMemoryAppender.java

@@ -26,10 +26,9 @@ package com.iluwatar.proxy.utils;
 import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
-import org.slf4j.LoggerFactory;
-
 import java.util.LinkedList;
 import java.util.List;
+import org.slf4j.LoggerFactory;
 
 
 /**
@@ -54,7 +53,7 @@ public class InMemoryAppender extends AppenderBase<ILoggingEvent> {
   }
 
   public boolean logContains(String message) {
-    return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message));
+    return log.stream().map(ILoggingEvent::getFormattedMessage).anyMatch(message::equals);
   }
 
   public int getLogSize() {