diff --git a/abstract-factory/README.md b/abstract-factory/README.md
index 2a8fecd36..a3881b893 100644
--- a/abstract-factory/README.md
+++ b/abstract-factory/README.md
@@ -5,7 +5,7 @@ folder: abstract-factory
 permalink: /patterns/abstract-factory/
 pumlid: PSZB3OD034NHLa81Czwd6sCC39gVxEUWT1_ssLmTtQLqgR5fM7sTmFGtaV6TZu8prd0r6HtQaMKqAZLk1XjT_E6qgPUZfyc0MdTgx0-8LuUn8ErFXdr98NypXxKyezKV
 categories: Creational
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
@@ -31,6 +31,8 @@ Use the Abstract Factory pattern when
 ## Real world examples
 
 * [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)
+* [javax.xml.transform.TransformerFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/transform/TransformerFactory.html#newInstance--)
+* [javax.xml.xpath.XPathFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathFactory.html#newInstance--)
 
 ## Credits
 
diff --git a/adapter/README.md b/adapter/README.md
index 66ca63826..6bd6d66e1 100644
--- a/adapter/README.md
+++ b/adapter/README.md
@@ -31,6 +31,10 @@ Use the Adapter pattern when
 ## Real world examples
 
 * [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29)
+* [java.util.Collections#list()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#list-java.util.Enumeration-)
+* [java.util.Collections#enumeration()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#enumeration-java.util.Collection-)
+* [javax.xml.bind.annotation.adapters.XMLAdapter](http://docs.oracle.com/javase/8/docs/api/javax/xml/bind/annotation/adapters/XmlAdapter.html#marshal-BoundType-)
+
 
 ## Credits
 
diff --git a/builder/README.md b/builder/README.md
index 6a661502f..335862676 100644
--- a/builder/README.md
+++ b/builder/README.md
@@ -27,6 +27,9 @@ Use the Builder pattern when
 ## Real world examples
 
 * [java.lang.StringBuilder](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html)
+* [java.nio.ByteBuffer](http://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html#put-byte-) as well as similar buffers such as FloatBuffer, IntBuffer and so on.
+* [java.lang.StringBuffer](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuffer.html#append-boolean-)
+* All implementations of [java.lang.Appendable](http://docs.oracle.com/javase/8/docs/api/java/lang/Appendable.html)
 * [Apache Camel builders](https://github.com/apache/camel/tree/0e195428ee04531be27a0b659005e3aa8d159d23/camel-core/src/main/java/org/apache/camel/builder)
 
 ## Credits
diff --git a/chain/README.md b/chain/README.md
index 5ab4b2256..f5f6c9de9 100644
--- a/chain/README.md
+++ b/chain/README.md
@@ -29,6 +29,7 @@ Use Chain of Responsibility when
 
 * [java.util.logging.Logger#log()](http://docs.oracle.com/javase/8/docs/api/java/util/logging/Logger.html#log%28java.util.logging.Level,%20java.lang.String%29)
 * [Apache Commons Chain](https://commons.apache.org/proper/commons-chain/index.html)
+* [javax.servlet.Filter#doFilter()](http://docs.oracle.com/javaee/7/api/javax/servlet/Filter.html#doFilter-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-)
 
 ## Credits
 
diff --git a/command/README.md b/command/README.md
index 9fb568f62..3996d2842 100644
--- a/command/README.md
+++ b/command/README.md
@@ -5,7 +5,7 @@ folder: command
 permalink: /patterns/command/
 pumlid: DSgn4OCm30NGLM00h3xR25i7vYpXaxx2-g59zugtTgiZcwIFvGHcV8YSdt9qdBbdYDVR88PIRwK-yc6mqyLVtff4FsoR38XRa7Aye3SgMoD1_RkaQvcfumS0
 categories: Behavioral
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
@@ -41,6 +41,7 @@ Use the Command pattern when you want to
 
 * [java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html)
 * [Netflix Hystrix](https://github.com/Netflix/Hystrix/wiki)
+* [javax.swing.Action](http://docs.oracle.com/javase/8/docs/api/javax/swing/Action.html)
 
 ## Credits
 
diff --git a/decorator/README.md b/decorator/README.md
index e65b0eb9e..819873429 100644
--- a/decorator/README.md
+++ b/decorator/README.md
@@ -28,6 +28,14 @@ Use Decorator
 * for responsibilities that can be withdrawn
 * when extension by subclassing is impractical. Sometimes a large number of independent extensions are possible and would produce an explosion of subclasses to support every combination. Or a class definition may be hidden or otherwise unavailable for subclassing
 
+## Real world examples
+ * [java.io.InputStream](http://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html), [java.io.OutputStream](http://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html),
+ [java.io.Reader](http://docs.oracle.com/javase/8/docs/api/java/io/Reader.html) and [java.io.Writer](http://docs.oracle.com/javase/8/docs/api/java/io/Writer.html)
+ * [java.util.Collections#synchronizedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#synchronizedCollection-java.util.Collection-)
+ * [java.util.Collections#unmodifiableXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#unmodifiableCollection-java.util.Collection-)
+ * [java.util.Collections#checkedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#checkedCollection-java.util.Collection-java.lang.Class-)
+
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
diff --git a/factory-method/README.md b/factory-method/README.md
index a444ffbd8..17e0818e9 100644
--- a/factory-method/README.md
+++ b/factory-method/README.md
@@ -5,7 +5,7 @@ folder: factory-method
 permalink: /patterns/factory-method/
 pumlid: NSZB3G8n30N0Lg20n7UwCOxPP9MVx6TMT0zdRgEvjoazYeRrMmMsFuYChtmqr7Y6gycQq8aiQr3hSJ7OwEGtfwBUZfas0shJQR3_G2yMBFkaeQYha4B-AeUDl6FqBm00
 categories: Creational
-tags: 
+tags:
  - Java
  - Difficulty-Beginner
  - Gang Of Four
@@ -30,9 +30,13 @@ Use the Factory Method pattern when
 
 ## Known uses
 
-* java.util.Calendar
-* java.util.ResourceBundle
-* java.text.NumberFormat#getInstance()
+* [java.util.Calendar](http://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance--)
+* [java.util.ResourceBundle](http://docs.oracle.com/javase/8/docs/api/java/util/ResourceBundle.html#getBundle-java.lang.String-)
+* [java.text.NumberFormat](http://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html#getInstance--)
+* [java.nio.charset.Charset](http://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html#forName-java.lang.String-)
+* [java.net.URLStreamHandlerFactory](http://docs.oracle.com/javase/8/docs/api/java/net/URLStreamHandlerFactory.html#createURLStreamHandler-java.lang.String-)
+* [java.util.EnumSet](https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html#of-E-)
+* [javax.xml.bind.JAXBContext](https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/JAXBContext.html#createMarshaller--)
 
 ## Credits
 
diff --git a/flyweight/README.md b/flyweight/README.md
index 1e71f1c02..469bb8626 100644
--- a/flyweight/README.md
+++ b/flyweight/README.md
@@ -5,7 +5,7 @@ folder: flyweight
 permalink: /patterns/flyweight/
 pumlid: HSV94S8m3030Lg20M7-w4OvYAoCh7Xtnq3ty-Eq-MQlaJcdow17JNm26gpIEdkzqidffa4Qfrm2MN1XeSEADsqxEJRU94MJgCD1_W4C-YxZr08hwNqaRPUQGBm00
 categories: Structural
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
@@ -31,7 +31,7 @@ true
 
 ## Real world examples
 
-* [java.lang.Integer#valueOf(int)](http://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#valueOf%28int%29)
+* [java.lang.Integer#valueOf(int)](http://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#valueOf%28int%29) and similarly for Byte, Character and other wrapped types.
 
 ## Credits
 
diff --git a/interpreter/README.md b/interpreter/README.md
index 7a09ab0c7..8600f0300 100644
--- a/interpreter/README.md
+++ b/interpreter/README.md
@@ -5,7 +5,7 @@ folder: interpreter
 permalink: /patterns/interpreter/
 pumlid: JSf13eCm30NHgz034E-vZGaM62Kcih_BzQ6xxjv8yr6hBJT9RzC1Z5Y8dE-oAuvSCyJhPH13gLSdRNapsEdaBy-RXEus3mR4BQXpl21zVnykFmlgVvVqNaRszW00
 categories: Behavioral
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
@@ -26,6 +26,13 @@ trees. The Interpreter pattern works best when
 * the grammar is simple. For complex grammars, the class hierarchy for the grammar becomes large and unmanageable. Tools such as parser generators are a better alternative in such cases. They can interpret expressions without building abstract syntax trees, which can save space and possibly time
 * efficiency is not a critical concern. The most efficient interpreters are usually not implemented by interpreting parse trees directly but by first translating them into another form. For example, regular expressions are often transformed into state machines. But even then, the translator can be implemented by the Interpreter pattern, so the pattern is still applicable
 
+## Real world examples
+* [java.util.Pattern](http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html)
+* [java.text.Normalizer](http://docs.oracle.com/javase/8/docs/api/java/text/Normalizer.html)
+* All subclasses of [java.text.Format](http://docs.oracle.com/javase/8/docs/api/java/text/Format.html)
+* [javax.el.ELResolver](http://docs.oracle.com/javaee/7/api/javax/el/ELResolver.html)
+
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
diff --git a/iterator/README.md b/iterator/README.md
index 91cc64d8d..61bd8f6f5 100644
--- a/iterator/README.md
+++ b/iterator/README.md
@@ -5,7 +5,7 @@ folder: iterator
 permalink: /patterns/iterator/
 pumlid: FSV13OGm30NHLg00uljsOu85HeaJsTzB-yjfBwCtgrfjUKXwMovWneV8-IcduiezGxmEWnXA7PsqvSDWfvk_l1qIUjes6H2teCxnWlGDOpW9wdzAUYypU_i1
 categories: Behavioral
-tags: 
+tags:
  - Java
  - Difficulty-Beginner
  - Gang Of Four
@@ -30,6 +30,7 @@ Use the Iterator pattern
 ## Real world examples
 
 * [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html)
+* [java.util.Enumeration](http://docs.oracle.com/javase/8/docs/api/java/util/Enumeration.html)
 
 ## Credits
 
diff --git a/mediator/README.md b/mediator/README.md
index 0e9f9c216..084e59256 100644
--- a/mediator/README.md
+++ b/mediator/README.md
@@ -25,6 +25,14 @@ Use the Mediator pattern when
 * reusing an object is difficult because it refers to and communicates with many other objects
 * a behavior that's distributed between several classes should be customizable without a lot of subclassing
 
+## Real world examples
+
+* All scheduleXXX() methods of [java.util.Timer](http://docs.oracle.com/javase/8/docs/api/java/util/Timer.html)
+* [java.util.concurrent.Executor#execute()](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html#execute-java.lang.Runnable-)
+* submit() and invokeXXX() methods of [java.util.concurrent.ExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html)
+* scheduleXXX() methods of [java.util.concurrent.ScheduledExecutorService](http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ScheduledExecutorService.html)
+* [java.lang.reflect.Method#invoke()](http://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html#invoke-java.lang.Object-java.lang.Object...-)
+
 ## Credits
 
-* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)	
+* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
diff --git a/observer/README.md b/observer/README.md
index 6a9e3f584..2ac98c401 100644
--- a/observer/README.md
+++ b/observer/README.md
@@ -5,7 +5,7 @@ folder: observer
 permalink: /patterns/observer/
 pumlid: FSkn4OGm30NHLg00hFow4KO3PcpP8tr1-pYwx6smQz5Suv2mkbp0y1-HyPlEWYlsSB7S5Q98kJSgDLu66ztyy7Q8brEtmO2OEZNs2Uhxl9u9GVv72cjfHAiV
 categories: Behavioral
-tags: 
+tags:
  - Java
  - Difficulty-Beginner
  - Gang Of Four
@@ -36,6 +36,8 @@ Use the Observer pattern in any of the following situations
 ## Real world examples
 
 * [java.util.Observer](http://docs.oracle.com/javase/8/docs/api/java/util/Observer.html)
+* [java.util.EventListener](http://docs.oracle.com/javase/8/docs/api/java/util/EventListener.html)
+* [javax.servlet.http.HttpSessionBindingListener](http://docs.oracle.com/javaee/7/api/javax/servlet/http/HttpSessionBindingListener.html)
 
 ## Credits
 
diff --git a/singleton/README.md b/singleton/README.md
index cd6fc131d..e1bb42a45 100644
--- a/singleton/README.md
+++ b/singleton/README.md
@@ -32,6 +32,9 @@ Use the Singleton pattern when
 ## Real world examples
 
 * [java.lang.Runtime#getRuntime()](http://docs.oracle.com/javase/8/docs/api/java/lang/Runtime.html#getRuntime%28%29)
+* [java.awt.Desktop#getDesktop()](http://docs.oracle.com/javase/8/docs/api/java/awt/Desktop.html#getDesktop--)
+* [java.lang.System#getSecurityManager()](http://docs.oracle.com/javase/8/docs/api/java/lang/System.html#getSecurityManager--)
+
 
 ## Credits
 
diff --git a/state/README.md b/state/README.md
index 8e3256b42..34ad8074c 100644
--- a/state/README.md
+++ b/state/README.md
@@ -26,6 +26,11 @@ Use the State pattern in either of the following cases
 * an object's behavior depends on its state, and it must change its behavior at run-time depending on that state
 * operations have large, multipart conditional statements that depend on the object's state. This state is usually represented by one or more enumerated constants. Often, several operations will contain this same conditional structure. The State pattern puts each branch of the conditional in a separate class. This lets you treat the object's state as an object in its own right that can vary independently from other objects.
 
+## Real world examples
+
+* [javax.faces.lifecycle.Lifecycle#execute()](http://docs.oracle.com/javaee/7/api/javax/faces/lifecycle/Lifecycle.html#execute-javax.faces.context.FacesContext-) controlled by [FacesServlet](http://docs.oracle.com/javaee/7/api/javax/faces/webapp/FacesServlet.html), the behavior is dependent on current phase of lifecycle.
+* [JDiameter - Diameter State Machine](https://github.com/npathai/jdiameter/blob/master/core/jdiameter/api/src/main/java/org/jdiameter/api/app/State.java)
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
diff --git a/visitor/README.md b/visitor/README.md
index 712abad87..23ffc3af7 100644
--- a/visitor/README.md
+++ b/visitor/README.md
@@ -28,6 +28,9 @@ Use the Visitor pattern when
 ## Real world examples
 
 * [Apache Wicket](https://github.com/apache/wicket) component tree, see [MarkupContainer](https://github.com/apache/wicket/blob/b60ec64d0b50a611a9549809c9ab216f0ffa3ae3/wicket-core/src/main/java/org/apache/wicket/MarkupContainer.java)
+* [javax.lang.model.element.AnnotationValue](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/AnnotationValue.html) and [AnnotationValueVisitor](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/AnnotationValueVisitor.html)
+* [javax.lang.model.element.Element](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/Element.html) and [Element Visitor](http://docs.oracle.com/javase/8/docs/api/javax/lang/model/element/ElementVisitor.html)
+* [java.nio.file.FileVisitor](http://docs.oracle.com/javase/8/docs/api/java/nio/file/FileVisitor.html)
 
 ## Credits