Observer Pattern (use Observable)

design-pattern/src/AbstractFactory/abst/Body.java

@@ -1,4 +0,0 @@
-package AbstractFactory.abst;
-
-public interface Body {
-}

design-pattern/src/AbstractFactory/abst/Wheel.java

@@ -1,4 +0,0 @@
-package AbstractFactory.abst;
-
-public interface Wheel {
-}

design-pattern/src/AbstractFactory/example01/Main.java

@@ -1,10 +1,9 @@
-package AbstractFactory;
+package AbstractFactory.example01;
 
-import AbstractFactory.abst.BikeFactory;
+import AbstractFactory.example01.abst.BikeFactory;
-import AbstractFactory.abst.Body;
+import AbstractFactory.example01.abst.Body;
-import AbstractFactory.abst.Wheel;
+import AbstractFactory.example01.abst.Wheel;
-import AbstractFactory.gt.GtBikeFactory;
+import AbstractFactory.example01.gt.GtBikeFactory;
-import AbstractFactory.sam.SamFactory;
 
 public class Main {
     public static void main(String[] args) {

design-pattern/src/AbstractFactory/example01/abst/BikeFactory.java

@@ -1,4 +1,4 @@
-package AbstractFactory.abst;
+package AbstractFactory.example01.abst;
 
 public interface BikeFactory {
 

design-pattern/src/AbstractFactory/example01/abst/Body.java

@@ -0,0 +1,4 @@
+package AbstractFactory.example01.abst;
+
+public interface Body {
+}

design-pattern/src/AbstractFactory/example01/abst/Wheel.java

@@ -0,0 +1,4 @@
+package AbstractFactory.example01.abst;
+
+public interface Wheel {
+}

design-pattern/src/AbstractFactory/example01/gt/GtBikeFactory.java

@@ -1,8 +1,8 @@
-package AbstractFactory.gt;
+package AbstractFactory.example01.gt;
 
-import AbstractFactory.abst.BikeFactory;
+import AbstractFactory.example01.abst.BikeFactory;
-import AbstractFactory.abst.Body;
+import AbstractFactory.example01.abst.Body;
-import AbstractFactory.abst.Wheel;
+import AbstractFactory.example01.abst.Wheel;
 
 public class GtBikeFactory implements BikeFactory {
     @Override

design-pattern/src/AbstractFactory/example01/gt/GtBody.java

@@ -0,0 +1,6 @@
+package AbstractFactory.example01.gt;
+
+import AbstractFactory.example01.abst.Body;
+
+public class GtBody implements Body {
+}

design-pattern/src/AbstractFactory/example01/gt/GtWheel.java

@@ -0,0 +1,6 @@
+package AbstractFactory.example01.gt;
+
+import AbstractFactory.example01.abst.Wheel;
+
+public class GtWheel implements Wheel {
+}

design-pattern/src/AbstractFactory/example01/sam/SamBody.java

@@ -0,0 +1,6 @@
+package AbstractFactory.example01.sam;
+
+import AbstractFactory.example01.abst.Body;
+
+public class SamBody implements Body {
+}

design-pattern/src/AbstractFactory/example01/sam/SamFactory.java

@@ -1,8 +1,8 @@
-package AbstractFactory.sam;
+package AbstractFactory.example01.sam;
 
-import AbstractFactory.abst.BikeFactory;
+import AbstractFactory.example01.abst.BikeFactory;
-import AbstractFactory.abst.Body;
+import AbstractFactory.example01.abst.Body;
-import AbstractFactory.abst.Wheel;
+import AbstractFactory.example01.abst.Wheel;
 
 public class SamFactory implements BikeFactory {
     @Override

design-pattern/src/AbstractFactory/example01/sam/SamWheel.java

@@ -0,0 +1,6 @@
+package AbstractFactory.example01.sam;
+
+import AbstractFactory.example01.abst.Wheel;
+
+public class SamWheel implements Wheel {
+}

design-pattern/src/AbstractFactory/example02/Main.java

@@ -1,9 +1,9 @@
-package AbstractFactory2;
+package AbstractFactory.example02;
 
-import AbstractFactory2.abst.Button;
+import AbstractFactory.example02.abst.Button;
-import AbstractFactory2.abst.GuiFactory;
+import AbstractFactory.example02.abst.GuiFactory;
-import AbstractFactory2.abst.TextArea;
+import AbstractFactory.example02.abst.TextArea;
-import AbstractFactory2.concrete.FactoryInstance;
+import AbstractFactory.example02.concrete.FactoryInstance;
 
 public class Main {
     public static void main(String[] args) {

design-pattern/src/AbstractFactory/example02/abst/Button.java

@@ -1,4 +1,4 @@
-package AbstractFactory2.abst;
+package AbstractFactory.example02.abst;
 
 public interface Button {
 

design-pattern/src/AbstractFactory/example02/abst/GuiFactory.java

@@ -1,4 +1,4 @@
-package AbstractFactory2.abst;
+package AbstractFactory.example02.abst;
 
 public interface GuiFactory {
 

design-pattern/src/AbstractFactory/example02/abst/TextArea.java

@@ -1,4 +1,4 @@
-package AbstractFactory2.abst;
+package AbstractFactory.example02.abst;
 
 public interface TextArea {
     String getText();

design-pattern/src/AbstractFactory/example02/concrete/FactoryInstance.java

@@ -1,8 +1,8 @@
-package AbstractFactory2.concrete;
+package AbstractFactory.example02.concrete;
 
-import AbstractFactory2.abst.Button;
+import AbstractFactory.example02.abst.Button;
-import AbstractFactory2.abst.GuiFactory;
+import AbstractFactory.example02.abst.GuiFactory;
-import AbstractFactory2.abst.TextArea;
+import AbstractFactory.example02.abst.TextArea;
 
 public class FactoryInstance {
 

design-pattern/src/AbstractFactory/gt/GtBody.java

@@ -1,6 +0,0 @@
-package AbstractFactory.gt;
-
-import AbstractFactory.abst.Body;
-
-public class GtBody implements Body {
-}

design-pattern/src/AbstractFactory/gt/GtWheel.java

@@ -1,6 +0,0 @@
-package AbstractFactory.gt;
-
-import AbstractFactory.abst.Wheel;
-
-public class GtWheel implements Wheel {
-}

design-pattern/src/AbstractFactory/sam/SamBody.java

@@ -1,6 +0,0 @@
-package AbstractFactory.sam;
-
-import AbstractFactory.abst.Body;
-
-public class SamBody implements Body {
-}

design-pattern/src/AbstractFactory/sam/SamWheel.java

@@ -1,6 +0,0 @@
-package AbstractFactory.sam;
-
-import AbstractFactory.abst.Wheel;
-
-public class SamWheel implements Wheel {
-}

design-pattern/src/ChainOfResponsibility/example01/Calculator.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility;
+package ChainOfResponsibility.example01;
 
 abstract public class Calculator {
 

design-pattern/src/ChainOfResponsibility/example01/Main.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility;
+package ChainOfResponsibility.example01;
 
 public class Main {
     public static void main(String[] args) {

design-pattern/src/ChainOfResponsibility/example01/PlusCalculator.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility;
+package ChainOfResponsibility.example01;
 
 public class PlusCalculator extends Calculator {
 

design-pattern/src/ChainOfResponsibility/example01/Request.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility;
+package ChainOfResponsibility.example01;
 
 public class Request {
 

design-pattern/src/ChainOfResponsibility/example01/SubCalculator.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility;
+package ChainOfResponsibility.example01;
 
 public class SubCalculator extends Calculator {
 

design-pattern/src/ChainOfResponsibility/example02/Application.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility2;
+package ChainOfResponsibility.example02;
 
 public class Application {
     public static void main(String[] args) {

design-pattern/src/ChainOfResponsibility/example02/Armor.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility2;
+package ChainOfResponsibility.example02;
 
 public class Armor implements Defense{
 

design-pattern/src/ChainOfResponsibility/example02/Attack.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility2;
+package ChainOfResponsibility.example02;
 
 public class Attack {
 

design-pattern/src/ChainOfResponsibility/example02/Defense.java

@@ -1,4 +1,4 @@
-package ChainOfResponsibility2;
+package ChainOfResponsibility.example02;
 
 public interface Defense {
 

design-pattern/src/Observer/example01/Application.java

@@ -1,4 +1,4 @@
-package Observer;
+package Observer.example01;
 
 public class Application {
 

design-pattern/src/Observer/example01/Button.java

@@ -1,4 +1,4 @@
-package Observer;
+package Observer.example01;
 
 public class Button {
 

design-pattern/src/Observer/example02/Application.java

@@ -0,0 +1,21 @@
+package Observer.example02;
+
+import java.util.Observable;
+import java.util.Observer;
+
+public class Application {
+    public static void main(String[] args) {
+        Button button = new Button();
+
+        button.addObserver(new Observer() {
+            @Override
+            public void update(Observable o, Object arg) {
+                System.out.println(o + " is Clicked");
+            }
+        });
+
+        button.onClick();
+        button.onClick();
+        button.onClick();
+    }
+}

design-pattern/src/Observer/example02/Button.java

@@ -0,0 +1,11 @@
+package Observer.example02;
+
+import java.util.Observable;
+
+public class Button extends Observable {
+
+    public void onClick() {
+        setChanged();
+        notifyObservers();
+    }
+}