Closes #5 - Implemented Adapter Exercise

src/main/java/design/patterns/adapter/caching/AdapterCachingDemo.java

@@ -1,6 +1,5 @@
 package design.patterns.adapter.caching;
 
-import design.patterns.adapter.caching.adapters.LineToPointAdapter;
 import design.patterns.adapter.caching.model.Line;
 import design.patterns.adapter.caching.model.Point;
 import design.patterns.adapter.caching.model.VectorObject;

src/main/java/design/patterns/adapter/caching/adapters/LineToPointAdapter.java → src/main/java/design/patterns/adapter/caching/LineToPointAdapter.java

@@ -1,4 +1,4 @@
-package design.patterns.adapter.caching.adapters;
+package design.patterns.adapter.caching;
 
 import design.patterns.adapter.caching.model.Line;
 import design.patterns.adapter.caching.model.Point;

src/main/java/design/patterns/adapter/exercise/SimpleAdapterDemo.java

@@ -0,0 +1,17 @@
+package design.patterns.adapter.exercise;
+
+import design.patterns.adapter.exercise.model.Square;
+
+//uses a simple adapter to use the Rectangle interface with a Square
+
+public class SimpleAdapterDemo {
+    public static void main(String[] args) {
+
+        SquareToRectangleAdapter adapter =
+                new SquareToRectangleAdapter(new Square(10));
+
+        System.out.println("Height: " + adapter.getHeight());
+        System.out.println("Width: " + adapter.getWidth());
+        System.out.println("Area: " + adapter.getArea());
+    }
+}

src/main/java/design/patterns/adapter/exercise/SquareToRectangleAdapter.java

@@ -0,0 +1,22 @@
+package design.patterns.adapter.exercise;
+
+import design.patterns.adapter.exercise.model.Rectangle;
+import design.patterns.adapter.exercise.model.Square;
+
+public class SquareToRectangleAdapter implements Rectangle {
+
+    private int side;
+
+    public SquareToRectangleAdapter(Square square)
+    {
+        this.side = square.side;
+    }
+
+    public int getWidth() {
+        return side;
+    }
+
+    public int getHeight() {
+        return side;
+    }
+}

src/main/java/design/patterns/adapter/exercise/model/Rectangle.java

@@ -0,0 +1,12 @@
+package design.patterns.adapter.exercise.model;
+
+public interface Rectangle {
+
+    int getWidth();
+    int getHeight();
+
+    default int getArea()
+    {
+        return getWidth() * getHeight();
+    }
+}

src/main/java/design/patterns/adapter/exercise/model/Square.java

@@ -0,0 +1,10 @@
+package design.patterns.adapter.exercise.model;
+
+public class Square {
+
+    public int side;
+
+    public Square(int side) {
+        this.side = side;
+    }
+}