added lab1 ex2

src/lab1_decorator/ex2/BorderDecorator.java

@@ -0,0 +1,16 @@
+package lab1_decorator.ex2;
+
+public class BorderDecorator extends ShapeDecorator {
+    private int thickness;
+
+    public BorderDecorator(Shape shape, int thickness) {
+        super(shape);
+        this.thickness = thickness;
+    }
+
+    @Override
+    public void draw() {
+        super.draw();
+        System.out.printf("    with a %dpx border%n", thickness);
+    }
+}

src/lab1_decorator/ex2/Circle.java

@@ -0,0 +1,14 @@
+package lab1_decorator.ex2;
+
+public class Circle extends Shape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Drawing a circle");
+    }
+}

src/lab1_decorator/ex2/ColorDecorator.java

@@ -0,0 +1,16 @@
+package lab1_decorator.ex2;
+
+public class ColorDecorator extends ShapeDecorator {
+    private String color;
+
+    public ColorDecorator(Shape shape, String color) {
+        super(shape);
+        this.color = color;
+    }
+
+    @Override
+    public void draw() {
+        super.draw();
+        System.out.printf("    in a %s color%n", color);
+    }
+}

src/lab1_decorator/ex2/Rectangle.java

@@ -0,0 +1,16 @@
+package lab1_decorator.ex2;
+
+public class Rectangle extends Shape {
+    private double width;
+    private double height;
+
+    public Rectangle(double width, double height) {
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Drawing a rectangle");
+    }
+}

src/lab1_decorator/ex2/Shape.java

@@ -0,0 +1,5 @@
+package lab1_decorator.ex2;
+
+public abstract class Shape {
+    public abstract void draw();
+}

src/lab1_decorator/ex2/ShapeDecorator.java

@@ -0,0 +1,14 @@
+package lab1_decorator.ex2;
+
+public abstract class ShapeDecorator extends Shape {
+    private Shape shape;
+
+    public ShapeDecorator(Shape shape) {
+        this.shape = shape;
+    }
+
+    @Override
+    public void draw() {
+        shape.draw();
+    }
+}

src/lab1_decorator/ex2/ShapeDemo.java

@@ -0,0 +1,39 @@
+package lab1_decorator.ex2;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShapeDemo {
+    private static List<Shape> shapes;
+
+    public static void main(String[] args) {
+        shapes = new ArrayList<Shape>();
+
+        Shape shape1 = new Circle(10);
+        Shape shape2 = new Square(5);
+        Shape shape3 = new Rectangle(9, 3);
+
+        shapes.add(shape1);
+        shapes.add(shape2);
+        shapes.add(shape3);
+
+        for(Shape s : shapes) {
+            s.draw();
+        }
+
+        shape1 = new BorderDecorator(shape1, 4);
+        shape1 = new ColorDecorator(shape1, "Red");
+        shape1 = new TextureDecorator(shape1, "points");
+        shape1 = new TextureDecorator(shape1, "lines");
+        shapes.add(shape1);
+        shape2 = new ColorDecorator(shape2, "Green");
+        shapes.add(shape2);
+
+        shape3 = new BorderDecorator(shape3, 6);
+        shapes.add(shape3);
+
+        for(Shape s : shapes) {
+            s.draw();
+        }
+    }
+}

src/lab1_decorator/ex2/Square.java

@@ -0,0 +1,14 @@
+package lab1_decorator.ex2;
+
+public class Square extends Shape {
+    private double size;
+
+    public Square(double size) {
+        this.size = size;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Drawing a square");
+    }
+}

src/lab1_decorator/ex2/TextureDecorator.java

@@ -0,0 +1,16 @@
+package lab1_decorator.ex2;
+
+public class TextureDecorator extends ShapeDecorator {
+    private String texture;
+
+    public TextureDecorator(Shape shape, String texture) {
+        super(shape);
+        this.texture = texture;
+    }
+
+    @Override
+    public void draw() {
+        super.draw();
+        System.out.printf("    using %s%n", this.texture);
+    }
+}