Add Java annotation to code blocks in README files

abstract-factory/README.md

@@ -34,7 +34,7 @@ Wikipedia says
 
 Translating the kingdom example above. First of all we have some interfaces and implementation for the objects in the kingdom
 
-```
+```java
 public interface Castle {
   String getDescription();
 }
@@ -74,7 +74,7 @@ public class ElfArmy implements Army {
 
 Then we have the abstraction and implementations for the kingdom factory
 
-```
+```java
 public interface KingdomFactory {
   Castle createCastle();
   King createKing();
@@ -108,7 +108,7 @@ public class OrcKingdomFactory implements KingdomFactory {
 
 Now we have our abstract factory that lets us make family of related objects i.e. Elven kingdom factory creates Elven castle, king and army etc.
 
-```
+```java
 KingdomFactory factory = new ElfKingdomFactory();
 Castle castle = factory.createCastle();
 King king = factory.createKing();
@@ -123,7 +123,7 @@ Now, we can design a factory for our different kingdom factories. In this exampl
 The client can use FactoryMaker to create the desired concrete factory which, in turn, will produce different concrete objects (Army, King, Castle).  
 In this example, we also used an enum to parameterize which type of kingdom factory the client will ask for.
 
-```
+```java
 public static class FactoryMaker {
 
   public enum KingdomType {

adapter/README.md

@@ -40,7 +40,7 @@ Consider a captain that can only use rowing boats and cannot sail at all.
 
 First we have interfaces `RowingBoat` and `FishingBoat`
 
-```
+```java
 public interface RowingBoat {
   void row();
 }
@@ -55,7 +55,7 @@ public class FishingBoat {
 
 And captain expects an implementation of `RowingBoat` interface to be able to move
 
-```
+```java
 public class Captain implements RowingBoat {
 
   private RowingBoat rowingBoat;
@@ -73,7 +73,7 @@ public class Captain implements RowingBoat {
 
 Now let's say the pirates are coming and our captain needs to escape but there is only fishing boat available. We need to create an adapter that allows the captain to operate the fishing boat with his rowing boat skills.
 
-```
+```java
 public class FishingBoatAdapter implements RowingBoat {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoatAdapter.class);
@@ -93,7 +93,7 @@ public class FishingBoatAdapter implements RowingBoat {
 
 And now the `Captain` can use the `FishingBoat` to escape the pirates.
 
-```
+```java
 Captain captain = new Captain(new FishingBoatAdapter());
 captain.row();
 ```

bridge/README.md

@@ -34,7 +34,7 @@ Wikipedia says
 
 Translating our weapon example from above. Here we have the `Weapon` hierarchy
 
-```
+```java
 public interface Weapon {
   void wield();
   void swing();
@@ -109,7 +109,7 @@ public class Hammer implements Weapon {
 
 And the separate enchantment hierarchy
 
-```
+```java
 public interface Enchantment {
   void onActivate();
   void apply();
@@ -155,7 +155,7 @@ public class SoulEatingEnchantment implements Enchantment {
 
 And both the hierarchies in action
 
-```
+```java
 Sword enchantedSword = new Sword(new SoulEatingEnchantment());
 enchantedSword.wield();
 enchantedSword.swing();

builder/README.md

@@ -31,7 +31,7 @@ Wikipedia says
 
 Having said that let me add a bit about what telescoping constructor anti-pattern is. At one point or the other we have all seen a constructor like below:
 
-```
+```java
 public Hero(Profession profession, String name, HairType hairType, HairColor hairColor, Armor armor, Weapon weapon) {
 }
 ```
@@ -42,7 +42,7 @@ As you can see the number of constructor parameters can quickly get out of hand
 
 The sane alternative is to use the Builder pattern. First of all we have our hero that we want to create
 
-```
+```java
 public final class Hero {
   private final Profession profession;
   private final String name;
@@ -64,7 +64,7 @@ public final class Hero {
 
 And then we have the builder
 
-```
+```java
   public static class Builder {
     private final Profession profession;
     private final String name;
@@ -109,7 +109,7 @@ And then we have the builder
 
 And then it can be used as:
 
-```
+```java
 Hero mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK).withWeapon(Weapon.DAGGER).build();
 ```
 

chain/README.md

@@ -33,7 +33,7 @@ Wikipedia says
 
 Translating our example with orcs from above. First we have the request class
 
-```
+```java
 public class Request {
 
   private final RequestType requestType;
@@ -64,7 +64,7 @@ public enum RequestType {
 
 Then the request handler hierarchy
 
-```
+```java
 public abstract class RequestHandler {
   private static final Logger LOGGER = LoggerFactory.getLogger(RequestHandler.class);
   private RequestHandler next;
@@ -114,7 +114,7 @@ public class OrcCommander extends RequestHandler {
 
 Then we have the Orc King who gives the orders and forms the chain
 
-```
+```java
 public class OrcKing {
   RequestHandler chain;
 
@@ -134,11 +134,15 @@ public class OrcKing {
 
 Then it is used as follows
 
-```
-OrcKing king = new OrcKing();
-king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle"
-king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner"
-king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); // Orc soldier handling request "collect tax"
+```java
+public class Main() {
+    public static void main(String[] args) {
+        OrcKing king = new OrcKing();
+        king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle"
+        king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner"
+        king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); // Orc soldier handling request "collect tax"
+    }
+}
 ```
 
 ## Applicability

composite/README.md

@@ -33,7 +33,7 @@ Wikipedia says
 
 Taking our sentence example from above. Here we have the base class and different printable types
 
-```
+```java
 public abstract class LetterComposite {
   private List<LetterComposite> children = new ArrayList<>();
   public void add(LetterComposite letter) {
@@ -91,7 +91,7 @@ public class Sentence extends LetterComposite {
 
 Then we have a messenger to carry messages
 
-```
+```java
 public class Messenger {
   LetterComposite messageFromOrcs() {
     List<Word> words = new ArrayList<>();
@@ -122,7 +122,7 @@ public class Messenger {
 
 And then it can be used as
 
-```
+```java
 LetterComposite orcMessage = new Messenger().messageFromOrcs();
 orcMessage.print(); // Where there is a whip there is a way.
 LetterComposite elfMessage = new Messenger().messageFromElves();

decorator/README.md

@@ -36,7 +36,7 @@ Wikipedia says
 
 Let's take the troll example. First of all we have a simple troll implementing the troll interface
 
-```
+```java
 public interface Troll {
   void attack();
   int getAttackPower();
@@ -66,7 +66,7 @@ public class SimpleTroll implements Troll {
 
 Next we want to add club for the troll. We can do it dynamically by using a decorator
 
-```
+```java
 public class ClubbedTroll implements Troll {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(ClubbedTroll.class);
@@ -97,7 +97,7 @@ public class ClubbedTroll implements Troll {
 
 Here's the troll in action
 
-```
+```java
 // simple troll
 Troll troll = new SimpleTroll();
 troll.attack(); // The troll tries to grab you!

facade/README.md

@@ -32,7 +32,7 @@ Wikipedia says
 
 Taking our goldmine example from above. Here we have the dwarven mine worker hierarchy
 
-```
+```java
 public abstract class DwarvenMineWorker {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(DwarvenMineWorker.class);
@@ -140,7 +140,7 @@ public class DwarvenCartOperator extends DwarvenMineWorker {
 
 To operate all these goldmine workers we have the facade
 
-```
+```java
 public class DwarvenGoldmineFacade {
 
   private final List<DwarvenMineWorker> workers;
@@ -175,7 +175,7 @@ public class DwarvenGoldmineFacade {
 
 Now to use the facade
 
-```
+```java
 DwarvenGoldmineFacade facade = new DwarvenGoldmineFacade();
 facade.startNewDay();
 // Dwarf gold digger wakes up.

factory-method/README.md

@@ -35,7 +35,7 @@ Wikipedia says
 
 Taking our blacksmith example above. First of all we have a blacksmith interface and some implementations for it
 
-```
+```java
 public interface Blacksmith {
   Weapon manufactureWeapon(WeaponType weaponType);
 }
@@ -55,7 +55,7 @@ public class OrcBlacksmith implements Blacksmith {
 
 Now as the customers come the correct type of blacksmith is summoned and requested weapons are manufactured
 
-```
+```java
 Blacksmith blacksmith = new ElfBlacksmith();
 blacksmith.manufactureWeapon(WeaponType.SPEAR);
 blacksmith.manufactureWeapon(WeaponType.AXE);

flyweight/README.md

@@ -32,7 +32,7 @@ Wikipedia says
 
 Translating our alchemist shop example from above. First of all we have different potion types
 
-```
+```java
 public interface Potion {
   void drink();
 }
@@ -64,7 +64,7 @@ public class InvisibilityPotion implements Potion {
 
 Then the actual Flyweight object which is the factory for creating potions
 
-```
+```java
 public class PotionFactory {
 
   private final Map<PotionType, Potion> potions;
@@ -100,7 +100,7 @@ public class PotionFactory {
 
 And it can be used as below
 
-```
+```java
 PotionFactory factory = new PotionFactory();
 factory.createPotion(PotionType.INVISIBILITY).drink(); // You become invisible. (Potion=6566818)
 factory.createPotion(PotionType.HEALING).drink(); // You feel healed. (Potion=648129364)

prototype/README.md

@@ -33,7 +33,7 @@ In short, it allows you to create a copy of an existing object and modify it to
 
 In Java, it can be easily done by implementing `Cloneable` and overriding `clone` from `Object`
 
-```
+```java
 class Sheep implements Cloneable {
   private String name;
   public Sheep(String name) { this.name = name; }
@@ -48,7 +48,7 @@ class Sheep implements Cloneable {
 
 Then it can be cloned like below
 
-```
+```java
 Sheep original = new Sheep("Jolly");
 System.out.println(original.getName()); // Jolly
 

proxy/README.md

@@ -34,7 +34,7 @@ Wikipedia says
 
 Taking our wizard tower example from above. Firstly we have the wizard tower interface and the ivory tower class
 
-```
+```java
 public interface WizardTower {
 
   void enter(Wizard wizard);
@@ -53,7 +53,7 @@ public class IvoryTower implements WizardTower {
 
 Then a simple wizard class
 
-```
+```java
 public class Wizard {
 
   private final String name;
@@ -71,7 +71,7 @@ public class Wizard {
 
 Then we have the proxy to add access control to wizard tower
 
-```
+```java
 public class WizardTowerProxy implements WizardTower {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(WizardTowerProxy.class);
@@ -100,7 +100,7 @@ public class WizardTowerProxy implements WizardTower {
 
 And here is tower entering scenario
 
-```
+```java
 WizardTowerProxy 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.

singleton/README.md

@@ -34,15 +34,15 @@ Joshua Bloch, Effective Java 2nd Edition p.18
 
 > A single-element enum type is the best way to implement a singleton
 
-```
+```java
 public enum EnumIvoryTower {
   INSTANCE;
 }
 ```
 
 Then in order to use
 
-```
+```java
 EnumIvoryTower enumIvoryTower1 = EnumIvoryTower.INSTANCE;
 EnumIvoryTower enumIvoryTower2 = EnumIvoryTower.INSTANCE;
 assertEquals(enumIvoryTower1, enumIvoryTower2); // true