added lab11 ex1

src/lab11_flyweight/ex1/Brush.java

@@ -0,0 +1,16 @@
+package lab11_flyweight.ex1;
+
+public class Brush implements DrawingTool {
+    private final Props props;
+
+    public Brush(Props props) {
+        this.props = props;
+    }
+
+    @Override
+    public void draw(String text) {
+        System.out.println("Drawing '" + text + "' in " + props.size + ", color:" + props.color);
+    }
+
+    public record Props(Size size, Color color) {}
+}

src/lab11_flyweight/ex1/BrushFactory.java

@@ -0,0 +1,17 @@
+package lab11_flyweight.ex1;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BrushFactory {
+    private final Map<Brush.Props, Brush> brushes = new HashMap<>();
+
+    public Brush getBrush(Brush.Props props) {
+        Brush brush = brushes.get(props);
+        if (brush == null) {
+            brush = new Brush(props);
+            brushes.put(props, brush);
+        }
+        return brush;
+    }
+}

src/lab11_flyweight/ex1/Color.java

@@ -0,0 +1,6 @@
+package lab11_flyweight.ex1;
+
+public enum Color {
+    BLUE,
+    RED
+}

src/lab11_flyweight/ex1/DrawingTool.java

@@ -0,0 +1,5 @@
+package lab11_flyweight.ex1;
+
+public interface DrawingTool {
+    void draw(String text);
+}

src/lab11_flyweight/ex1/Main.java

@@ -0,0 +1,31 @@
+package lab11_flyweight.ex1;
+
+public class Main {
+    public static void main(String[] args) {
+        BrushFactory factory = new BrushFactory();
+        Brush.Props props1 = new Brush.Props(Size.THICK, Color.RED);
+        Brush.Props props2 = new Brush.Props(Size.THIN, Color.BLUE);
+        DrawingTool brush1 = factory.getBrush(props1);
+        DrawingTool brush2 = factory.getBrush(props1);
+
+        brush1.draw("I am drawing with my first thick red brush");
+        brush2.draw("I am drawing with my second thick red brush");
+        System.out.println("first thick red brush hashcode: " + brush1.hashCode());
+        System.out.println("second thick red brush hashcode: " + brush2.hashCode());
+
+        System.out.println();
+        DrawingTool pencil = new Pencil();
+        pencil.draw("Bonjour");
+        System.out.println();
+
+        DrawingTool brush3 = factory.getBrush(props2);
+        DrawingTool brush4 = factory.getBrush(props2);
+
+        brush3.draw("I am drawing with my first thin blue brush");
+        brush4.draw("I am drawing with my second thin blue brush");
+        System.out.println("first thin blue brush hashcode: " + brush3.hashCode());
+        System.out.println("second thin blue brush hashcode: " + brush4.hashCode());
+
+
+    }
+}

src/lab11_flyweight/ex1/Pencil.java

@@ -0,0 +1,8 @@
+package lab11_flyweight.ex1;
+
+public class Pencil implements DrawingTool {
+    @Override
+    public void draw(String text) {
+        System.out.println("Pencil writes some content: " + text);
+    }
+}

src/lab11_flyweight/ex1/Size.java

@@ -0,0 +1,6 @@
+package lab11_flyweight.ex1;
+
+public enum Size {
+    THIN,
+    THICK
+}