decorator 패턴

src/gof/dp/decorator/Coffee.java

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+package gof.dp.decorator;
+
+public abstract class Coffee {
+
+    public abstract void brewing();
+}

src/gof/dp/decorator/CoffeeTest.java

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+package gof.dp.decorator;
+
+public class CoffeeTest {
+    public static void main(String[] args) {
+        Coffee etiopiaAmericano = new EtiopiaAmericano();
+        etiopiaAmericano.brewing();
+        System.out.println();
+
+        Coffee kenyaLatte = new Latte(new KenyaAmericano());
+        kenyaLatte.brewing();
+        System.out.println();
+
+        Mocha kenyaMocha = new Mocha(new Latte(new KenyaAmericano()));
+        kenyaMocha.brewing();
+        System.out.println();
+
+        WhippedCream etiopiaWhippedMocha =
+                new WhippedCream(new Mocha(new Latte( new EtiopiaAmericano())));
+        etiopiaWhippedMocha.brewing();
+        System.out.println();
+
+    }
+}

src/gof/dp/decorator/Decorator.java

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+package gof.dp.decorator;
+
+public abstract class Decorator extends Coffee{
+
+    Coffee coffee;
+    public Decorator(Coffee coffee){
+        this.coffee = coffee;
+    }
+
+    @Override
+    public void brewing(){
+        coffee.brewing();
+    }
+
+}

src/gof/dp/decorator/EtiopiaAmericano.java

@@ -0,0 +1,10 @@
+package gof.dp.decorator;
+
+public class EtiopiaAmericano extends Coffee{
+
+    @Override
+    public void brewing() {
+        System.out.println("EtiopiaAmericano");
+    }
+}
+

src/gof/dp/decorator/KenyaAmericano.java

@@ -0,0 +1,10 @@
+package gof.dp.decorator;
+
+public class KenyaAmericano extends Coffee{
+
+    @Override
+    public void brewing() {
+        System.out.println("KenyaAmericano");
+    }
+}
+

src/gof/dp/decorator/Latte.java

@@ -0,0 +1,12 @@
+package gof.dp.decorator;
+
+public class Latte extends Decorator{
+    public Latte(Coffee coffee) {
+        super(coffee);
+    }
+
+    public void brewing(){
+        super.brewing();
+        System.out.println("Add Milk");
+    }
+}

src/gof/dp/decorator/Mocha.java

@@ -0,0 +1,12 @@
+package gof.dp.decorator;
+
+public class Mocha extends Decorator{
+    public Mocha(Coffee coffee) {
+        super(coffee);
+    }
+
+    public void brewing(){
+        super.brewing();
+        System.out.println("Add Mocha");
+    }
+}

src/gof/dp/decorator/WhippedCream.java

@@ -0,0 +1,12 @@
+package gof.dp.decorator;
+
+public class WhippedCream extends Decorator{
+    public WhippedCream(Coffee coffee) {
+        super(coffee);
+    }
+
+    public void brewing(){
+        super.brewing();
+        System.out.println("Add WhippedCream");
+    }
+}