Link to the diagram, please? https://github.com/iluwatar/java-design-patterns/blob/master/event-asynchronous/etc/event-asynchronous.png May I take this issue? I am a bit confused. What should the .png look like? I think the method name has changed. `ThreadCompleteListener#notifyOfThreadComplete` no longer exists. The current version of the class has a different method, see here https://github.com/iluwatar/java-design-patterns/blob/master/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/ThreadCompleteListener.java. So you should just update the class diagram. We have used http://www.objectaid.com/ to generate the class diagrams. Go ahead @ThatGuyWithTheHat, just ask if you need more help.
event-asynchronous pattern   class diagram is error
The ThreadCompleteListener can't find “notifyOfThreadComplete” method
event-asynchronous/etc/event-asynchronous.ucls
event-asynchronous/etc/event-asynchronous.ucls
diff --git a/event-asynchronous/etc/event-asynchronous.ucls b/event-asynchronous/etc/event-asynchronous.ucls
index df09fc28d955..1327b7104459 100644
--- a/event-asynchronous/etc/event-asynchronous.ucls
+++ b/event-asynchronous/etc/event-asynchronous.ucls
@@ -1,63 +1,62 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<class-diagram version="1.1.10" icons="true" automaticImage="PNG" always-add-relationships="false" 
-  generalizations="true" realizations="true" associations="true" dependencies="false" nesting-relationships="true" 
-  router="FAN">  
-  <class id="1" language="java" name="com.iluwatar.event.asynchronous.App" project="event-asynchronous" 
-    file="/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/App.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="629" y="221"/>    
+<class-diagram version="1.2.2" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true" 
+  realizations="true" associations="true" dependencies="false" nesting-relationships="true" router="FAN">  
+  <interface id="1" language="java" name="com.iluwatar.event.asynchronous.IEvent" project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/IEvent.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="117" width="151" x="42" y="15"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
-      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
-  </class>  
-  <class id="2" language="java" name="com.iluwatar.event.asynchronous.Event" project="event-asynchronous" 
-    file="/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/Event.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="195" y="475"/>    
+  </interface>  
+  <interface id="2" language="java" name="com.iluwatar.event.asynchronous.ThreadCompleteListener" 
+    project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/ThreadCompleteListener.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="326" y="79"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
-      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
-  </class>  
-  <class id="3" language="java" name="com.iluwatar.event.asynchronous.EventManager" project="event-asynchronous" 
-    file="/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/EventManager.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="575" y="475"/>    
+  </interface>  
+  <class id="3" language="java" name="com.iluwatar.event.asynchronous.App" project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/App.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="554" y="119"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
-      <attributes public="false" package="false" protected="false" private="false" static="true"/>      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
   </class>  
-  <interface id="4" language="java" name="com.iluwatar.event.asynchronous.IEvent" project="event-asynchronous" 
-    file="/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/IEvent.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="196" y="197"/>    
+  <class id="4" language="java" name="com.iluwatar.event.asynchronous.EventAsynchronousTest" 
+    project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/test/java/com/iluwatar/event/asynchronous/EventAsynchronousTest.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="207" width="234" x="669" y="16"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
       <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
-  </interface>  
-  <interface id="5" language="java" name="com.iluwatar.event.asynchronous.ThreadCompleteListener" 
-    project="event-asynchronous" 
-    file="/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/ThreadCompleteListener.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="396" y="229"/>    
+  </class>  
+  <class id="5" language="java" name="com.iluwatar.event.asynchronous.Event" project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/Event.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="141" y="441"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
       <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
-  </interface>  
-  <class id="6" language="java" name="com.iluwatar.event.asynchronous.EventAsynchronousTest" 
-    project="event-asynchronous" 
-    file="/event-asynchronous/src/test/java/com/iluwatar/event/asynchronous/EventAsynchronousTest.java" binary="false" 
-    corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="924" y="220"/>    
+  </class>  
+  <class id="6" language="java" name="com.iluwatar.event.asynchronous.EventManager" project="java-design-patterns" 
+    file="/java-design-patterns/event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/EventManager.java" 
+    binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="431" y="439"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
       <attributes public="true" package="true" protected="true" private="true" static="true"/>      
@@ -65,49 +64,36 @@
     </display>  
   </class>  
   <association id="7">    
-    <end type="SOURCE" refId="6" navigable="false">      
-      <attribute id="8" name="app">        
-        <position height="0" width="0" x="0" y="0"/>      
-      </attribute>      
-      <multiplicity id="9" minimum="0" maximum="1">        
-        <position height="16" width="23" x="714" y="226"/>      
-      </multiplicity>    
+    <end type="SOURCE" refId="5" navigable="false">      
+      <attribute id="8" name="eventListener"/>      
+      <multiplicity id="9" minimum="0" maximum="1"/>    
     </end>    
-    <end type="TARGET" refId="1" navigable="true"/>    
+    <end type="TARGET" refId="2" navigable="true"/>    
     <display labels="true" multiplicity="true"/>  
   </association>  
-  <association id="10">    
-    <end type="SOURCE" refId="2" navigable="false">      
-      <attribute id="11" name="eventListener">        
-        <position height="18" width="74" x="250" y="287"/>      
-      </attribute>      
-      <multiplicity id="12" minimum="0" maximum="1">        
-        <position height="0" width="0" x="0" y="0"/>      
-      </multiplicity>    
+  <realization id="10">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="1"/>  
+  </realization>  
+  <association id="11">    
+    <end type="SOURCE" refId="4" navigable="false">      
+      <attribute id="12" name="app"/>      
+      <multiplicity id="13" minimum="0" maximum="1"/>    
     </end>    
-    <end type="TARGET" refId="5" navigable="true"/>    
+    <end type="TARGET" refId="3" navigable="true"/>    
     <display labels="true" multiplicity="true"/>  
   </association>  
-  <association id="13">    
-    <bendpoint x="433" y="475"/>    
-    <end type="SOURCE" refId="3" navigable="false">      
-      <attribute id="14" name="eventPool">        
-        <position height="0" width="0" x="0" y="0"/>      
-      </attribute>      
-      <multiplicity id="15" minimum="0" maximum="2147483647">        
-        <position height="0" width="0" x="0" y="0"/>      
-      </multiplicity>    
+  <association id="14">    
+    <end type="SOURCE" refId="6" navigable="false">      
+      <attribute id="15" name="eventPool"/>      
+      <multiplicity id="16" minimum="0" maximum="2147483647"/>    
     </end>    
-    <end type="TARGET" refId="2" navigable="true"/>    
+    <end type="TARGET" refId="5" navigable="true"/>    
     <display labels="true" multiplicity="true"/>  
   </association>  
-  <realization id="16">    
-    <end type="SOURCE" refId="2"/>    
-    <end type="TARGET" refId="4"/>  
-  </realization>  
   <realization id="17">    
-    <end type="SOURCE" refId="3"/>    
-    <end type="TARGET" refId="5"/>  
+    <end type="SOURCE" refId="6"/>    
+    <end type="TARGET" refId="2"/>  
   </realization>  
   <classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
     sort-features="false" accessors="true" visibility="true">    
