Add creational patterns, Interpreter; remove scripts; update README

01-creational/abstract-factory/Application.java

@@ -0,0 +1,21 @@
+package abstractfactory;
+
+/** Client - uses the factory without knowing concrete classes */
+public class Application {
+    private final Button button;
+    private final Checkbox checkbox;
+
+    public Application(GUIFactory factory) {
+        button   = factory.createButton();
+        checkbox = factory.createCheckbox();
+    }
+
+    public void render() {
+        button.render();
+        checkbox.render();
+    }
+
+    public void simulateClick() {
+        button.onClick();
+    }
+}

01-creational/abstract-factory/Button.java

@@ -0,0 +1,6 @@
+package abstractfactory;
+
+public interface Button {
+    void render();
+    void onClick();
+}

01-creational/abstract-factory/Checkbox.java

@@ -0,0 +1,5 @@
+package abstractfactory;
+
+public interface Checkbox {
+    void render();
+}

01-creational/abstract-factory/GUIFactory.java

@@ -0,0 +1,7 @@
+package abstractfactory;
+
+/** Abstract Factory - creates families of related UI components */
+public interface GUIFactory {
+    Button createButton();
+    Checkbox createCheckbox();
+}

01-creational/abstract-factory/MacButton.java

@@ -0,0 +1,6 @@
+package abstractfactory;
+
+public class MacButton implements Button {
+    @Override public void render()   { System.out.println("[Mac] Rendering button with rounded corners"); }
+    @Override public void onClick()  { System.out.println("[Mac] Button clicked - glow animation"); }
+}

01-creational/abstract-factory/MacCheckbox.java

@@ -0,0 +1,5 @@
+package abstractfactory;
+
+public class MacCheckbox implements Checkbox {
+    @Override public void render() { System.out.println("[Mac] Rendering checkbox with rounded tick box"); }
+}

01-creational/abstract-factory/MacFactory.java

@@ -0,0 +1,6 @@
+package abstractfactory;
+
+public class MacFactory implements GUIFactory {
+    @Override public Button   createButton()   { return new MacButton(); }
+    @Override public Checkbox createCheckbox() { return new MacCheckbox(); }
+}

01-creational/abstract-factory/Main.java

@@ -0,0 +1,22 @@
+package abstractfactory;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("=== Abstract Factory Pattern Demo ===\n");
+
+        String os = System.getProperty("os.name", "Windows").toLowerCase();
+        GUIFactory factory = os.contains("mac") ? new MacFactory() : new WindowsFactory();
+
+        System.out.println("Detected OS family: " + (os.contains("mac") ? "Mac" : "Windows"));
+        System.out.println();
+
+        Application app = new Application(factory);
+        app.render();
+        app.simulateClick();
+
+        System.out.println("\n--- Forcing Mac UI ---");
+        Application macApp = new Application(new MacFactory());
+        macApp.render();
+        macApp.simulateClick();
+    }
+}

01-creational/abstract-factory/WindowsButton.java

@@ -0,0 +1,6 @@
+package abstractfactory;
+
+public class WindowsButton implements Button {
+    @Override public void render()   { System.out.println("[Windows] Rendering button with square corners"); }
+    @Override public void onClick()  { System.out.println("[Windows] Button clicked - raised border effect"); }
+}

01-creational/abstract-factory/WindowsCheckbox.java

@@ -0,0 +1,5 @@
+package abstractfactory;
+
+public class WindowsCheckbox implements Checkbox {
+    @Override public void render() { System.out.println("[Windows] Rendering checkbox with square tick box"); }
+}

01-creational/abstract-factory/WindowsFactory.java

@@ -0,0 +1,6 @@
+package abstractfactory;
+
+public class WindowsFactory implements GUIFactory {
+    @Override public Button   createButton()   { return new WindowsButton(); }
+    @Override public Checkbox createCheckbox() { return new WindowsCheckbox(); }
+}

01-creational/builder/Director.java

@@ -0,0 +1,12 @@
+package builder;
+
+/** Director knows how to build common configurations */
+public class Director {
+    public House buildStarter(House.Builder builder) {
+        return builder.rooms(2).floors(1).garage(false).roofType("gabled").build();
+    }
+
+    public House buildLuxury(House.Builder builder) {
+        return builder.rooms(6).floors(3).garage(true).garden(true).pool(true).roofType("hip").build();
+    }
+}

01-creational/builder/House.java

@@ -0,0 +1,43 @@
+package builder;
+
+public class House {
+    private final int rooms;
+    private final int floors;
+    private final boolean hasGarage;
+    private final boolean hasGarden;
+    private final boolean hasPool;
+    private final String roofType;
+
+    private House(Builder builder) {
+        this.rooms     = builder.rooms;
+        this.floors    = builder.floors;
+        this.hasGarage = builder.hasGarage;
+        this.hasGarden = builder.hasGarden;
+        this.hasPool   = builder.hasPool;
+        this.roofType  = builder.roofType;
+    }
+
+    @Override
+    public String toString() {
+        return "House{rooms=" + rooms + ", floors=" + floors
+                + ", garage=" + hasGarage + ", garden=" + hasGarden
+                + ", pool=" + hasPool + ", roof='" + roofType + "'}";
+    }
+
+    public static class Builder {
+        private int rooms = 1;
+        private int floors = 1;
+        private boolean hasGarage = false;
+        private boolean hasGarden = false;
+        private boolean hasPool   = false;
+        private String roofType   = "flat";
+
+        public Builder rooms(int rooms)           { this.rooms = rooms;         return this; }
+        public Builder floors(int floors)         { this.floors = floors;       return this; }
+        public Builder garage(boolean v)          { this.hasGarage = v;         return this; }
+        public Builder garden(boolean v)          { this.hasGarden = v;         return this; }
+        public Builder pool(boolean v)            { this.hasPool = v;           return this; }
+        public Builder roofType(String roofType)  { this.roofType = roofType;   return this; }
+        public House build()                      { return new House(this); }
+    }
+}

01-creational/builder/Main.java

@@ -0,0 +1,20 @@
+package builder;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("=== Builder Pattern Demo ===\n");
+
+        Director director = new Director();
+
+        House starter = director.buildStarter(new House.Builder());
+        System.out.println("Starter home : " + starter);
+
+        House luxury = director.buildLuxury(new House.Builder());
+        System.out.println("Luxury home  : " + luxury);
+
+        // Client builds a custom house directly without the Director
+        House custom = new House.Builder()
+                .rooms(4).floors(2).garden(true).roofType("mansard").build();
+        System.out.println("Custom home  : " + custom);
+    }
+}

01-creational/factory-method/EmailNotification.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class EmailNotification implements Notification {
+    private final String email;
+    public EmailNotification(String email) { this.email = email; }
+
+    @Override
+    public void send(String message) {
+        System.out.println("Email -> " + email + ": " + message);
+    }
+}

01-creational/factory-method/EmailService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class EmailService extends NotificationService {
+    private final String email;
+    public EmailService(String email) { this.email = email; }
+
+    @Override
+    protected Notification createNotification() {
+        return new EmailNotification(email);
+    }
+}

01-creational/factory-method/Main.java

@@ -0,0 +1,17 @@
+package factorymethod;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("=== Factory Method Pattern Demo ===\n");
+
+        NotificationService[] services = {
+            new EmailService("alice@example.com"),
+            new SmsService("+1-555-0123"),
+            new PushService("device-token-abc123")
+        };
+
+        for (NotificationService service : services) {
+            service.notifyUser("Your order #1042 has been shipped!");
+        }
+    }
+}

01-creational/factory-method/Notification.java

@@ -0,0 +1,5 @@
+package factorymethod;
+
+public interface Notification {
+    void send(String message);
+}

01-creational/factory-method/NotificationService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+/** Creator - declares the factory method */
+public abstract class NotificationService {
+    protected abstract Notification createNotification();
+
+    public void notifyUser(String message) {
+        Notification n = createNotification();
+        n.send(message);
+    }
+}

01-creational/factory-method/PushNotification.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class PushNotification implements Notification {
+    private final String deviceToken;
+    public PushNotification(String deviceToken) { this.deviceToken = deviceToken; }
+
+    @Override
+    public void send(String message) {
+        System.out.println("Push -> " + deviceToken + ": " + message);
+    }
+}

01-creational/factory-method/PushService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class PushService extends NotificationService {
+    private final String token;
+    public PushService(String token) { this.token = token; }
+
+    @Override
+    protected Notification createNotification() {
+        return new PushNotification(token);
+    }
+}

01-creational/factory-method/SmsNotification.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class SmsNotification implements Notification {
+    private final String phone;
+    public SmsNotification(String phone) { this.phone = phone; }
+
+    @Override
+    public void send(String message) {
+        System.out.println("SMS -> " + phone + ": " + message);
+    }
+}

01-creational/factory-method/SmsService.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class SmsService extends NotificationService {
+    private final String phone;
+    public SmsService(String phone) { this.phone = phone; }
+
+    @Override
+    protected Notification createNotification() {
+        return new SmsNotification(phone);
+    }
+}

01-creational/prototype/Circle.java

@@ -0,0 +1,24 @@
+package prototype;
+
+public class Circle extends Shape {
+    private int radius;
+
+    public Circle(int radius, String color) {
+        this.radius = radius;
+        this.color  = color;
+    }
+
+    /** Copy constructor used by clone() */
+    private Circle(Circle source) {
+        super(source);
+        this.radius = source.radius;
+    }
+
+    @Override
+    public Circle clone() { return new Circle(this); }
+
+    @Override
+    public String toString() {
+        return "Circle{color=" + color + ", radius=" + radius + ", pos=(" + x + "," + y + ")}";
+    }
+}

01-creational/prototype/Main.java

@@ -0,0 +1,33 @@
+package prototype;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("=== Prototype Pattern Demo ===\n");
+
+        List<Shape> originals = new ArrayList<>();
+        originals.add(new Circle(10, "red"));
+        originals.add(new Rectangle(20, 30, "blue"));
+
+        // Clone each shape - no need to know the concrete type
+        List<Shape> copies = new ArrayList<>();
+        for (Shape shape : originals) {
+            copies.add(shape.clone());
+        }
+
+        // Mutate copies - originals are unaffected
+        copies.get(0).setColor("green");
+        copies.get(0).move(5, 5);
+        copies.get(1).setColor("yellow");
+
+        System.out.println("--- Originals ---");
+        originals.forEach(System.out::println);
+
+        System.out.println("\n--- Clones (mutated) ---");
+        copies.forEach(System.out::println);
+
+        System.out.println("\nSame instance? " + (originals.get(0) == copies.get(0)));
+    }
+}

01-creational/prototype/Rectangle.java

@@ -0,0 +1,26 @@
+package prototype;
+
+public class Rectangle extends Shape {
+    private int width;
+    private int height;
+
+    public Rectangle(int width, int height, String color) {
+        this.width  = width;
+        this.height = height;
+        this.color  = color;
+    }
+
+    private Rectangle(Rectangle source) {
+        super(source);
+        this.width  = source.width;
+        this.height = source.height;
+    }
+
+    @Override
+    public Rectangle clone() { return new Rectangle(this); }
+
+    @Override
+    public String toString() {
+        return "Rectangle{color=" + color + ", size=" + width + "x" + height + ", pos=(" + x + "," + y + ")}";
+    }
+}

01-creational/prototype/Shape.java

@@ -0,0 +1,22 @@
+package prototype;
+
+/** Prototype - every shape can clone itself */
+public abstract class Shape {
+    protected String color;
+    protected int x;
+    protected int y;
+
+    protected Shape(Shape source) {
+        this.color = source.color;
+        this.x     = source.x;
+        this.y     = source.y;
+    }
+
+    protected Shape() {}
+
+    public abstract Shape clone();
+
+    public void setColor(String color) { this.color = color; }
+    public String getColor()           { return color; }
+    public void move(int x, int y)     { this.x = x; this.y = y; }
+}

01-creational/singleton/DatabaseConnection.java

@@ -0,0 +1,34 @@
+package singleton;
+
+/**
+ * Thread-safe Singleton using double-checked locking.
+ */
+public class DatabaseConnection {
+    private static volatile DatabaseConnection instance;
+    private final String url;
+    private int queryCount = 0;
+
+    private DatabaseConnection() {
+        this.url = "jdbc:mysql://localhost:3306/myapp";
+        System.out.println("Establishing connection to " + url);
+    }
+
+    public static DatabaseConnection getInstance() {
+        if (instance == null) {
+            synchronized (DatabaseConnection.class) {
+                if (instance == null) {
+                    instance = new DatabaseConnection();
+                }
+            }
+        }
+        return instance;
+    }
+
+    public String executeQuery(String sql) {
+        queryCount++;
+        return "Result #" + queryCount + " for: " + sql;
+    }
+
+    public int getQueryCount() { return queryCount; }
+    public String getUrl()     { return url; }
+}

01-creational/singleton/Main.java

@@ -0,0 +1,19 @@
+package singleton;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("=== Singleton Pattern Demo ===\n");
+
+        DatabaseConnection c1 = DatabaseConnection.getInstance();
+        DatabaseConnection c2 = DatabaseConnection.getInstance();
+        DatabaseConnection c3 = DatabaseConnection.getInstance();
+
+        System.out.println("\nAll three references same instance? " + (c1 == c2 && c2 == c3));
+
+        System.out.println(c1.executeQuery("SELECT * FROM users"));
+        System.out.println(c2.executeQuery("SELECT * FROM orders"));
+        System.out.println(c3.executeQuery("SELECT COUNT(*) FROM products"));
+
+        System.out.println("\nTotal queries: " + c1.getQueryCount());
+    }
+}

PUSH-TO-GITEA.bat

@@ -1,2 +0,0 @@
-@echo off
-powershell -ExecutionPolicy Bypass -NoExit -File "%~dp0push-to-gitea.ps1"

README.md

@@ -1,6 +1,8 @@
 # GoF Design Patterns in Java
 
-Complete runnable Java 17 implementations of all 23 Gang of Four design patterns. Each pattern has a dedicated article at [ankurm.com](https://ankurm.com/gof-design-patterns-java/) with a UML diagram, step-by-step explanation, and console output.
+Complete runnable Java 17 implementations of all 23 Gang of Four design patterns.
+Each pattern has a dedicated article at [ankurm.com](https://ankurm.com/gof-design-patterns-java/)
+with a UML diagram, step-by-step explanation, and console output.
 
 ## Structure
 
@@ -41,27 +43,16 @@ design-patterns/
 
 ## Run any pattern
 
-```powershell
-# Windows (PowerShell)
-$JAVAC = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\javac.exe'
-$JAVA  = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\java.exe'
-
-& $JAVAC 03-behavioral/strategy/*.java -d out/strategy
-& $JAVA -cp out/strategy strategy.Main
-```
-
 ```bash
-# Linux / macOS
+# Linux / macOS / Git Bash (Windows)
 javac 03-behavioral/strategy/*.java -d out/strategy
 java -cp out/strategy strategy.Main
 ```
 
-## Run all behavioral patterns (Windows)
-
-Double-click `RUN-behavioral.bat` or run in PowerShell:
-
-```powershell
-powershell -ExecutionPolicy Bypass -File run-behavioral.ps1
+```cmd
+REM Windows Command Prompt
+javac 03-behavioral\strategy\*.java -d out\strategy
+java -cp out\strategy strategy.Main
 ```
 
 ## Articles

RUN-behavioral.bat

@@ -1,2 +0,0 @@
-@echo off
-powershell -ExecutionPolicy Bypass -NoExit -Command "& 'C:\Users\Ankur\Claude\Projects\@ankurm Blog\design-patterns\run-behavioral.ps1'"

RUN.bat

@@ -1,2 +0,0 @@
-@echo off
-powershell -ExecutionPolicy Bypass -NoExit -Command "& 'C:\Users\Ankur\Claude\Projects\@ankurm Blog\design-patterns\run-structural.ps1'"

compile-and-run-structural.bat

@@ -1,74 +0,0 @@
-@echo off
-setlocal
-
-set BASE=%~dp0
-set OUT=%BASE%\out
-
-echo ============================================================
-echo Compiling and running structural design pattern examples
-echo ============================================================
-
-:: Create output dir
-if not exist "%OUT%" mkdir "%OUT%"
-
-:: --- Adapter ---
-echo.
-echo [1/7] ADAPTER
-javac -d "%OUT%\adapter" -sourcepath "%BASE%\02-structural\adapter" "%BASE%\02-structural\adapter\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Adapter) else (
-    java -cp "%OUT%\adapter" adapter.Main
-)
-
-:: --- Bridge ---
-echo.
-echo [2/7] BRIDGE
-javac -d "%OUT%\bridge" -sourcepath "%BASE%\02-structural\bridge" "%BASE%\02-structural\bridge\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Bridge) else (
-    java -cp "%OUT%\bridge" bridge.Main
-)
-
-:: --- Composite ---
-echo.
-echo [3/7] COMPOSITE
-javac -d "%OUT%\composite" -sourcepath "%BASE%\02-structural\composite" "%BASE%\02-structural\composite\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Composite) else (
-    java -cp "%OUT%\composite" composite.Main
-)
-
-:: --- Decorator ---
-echo.
-echo [4/7] DECORATOR
-javac -d "%OUT%\decorator" -sourcepath "%BASE%\02-structural\decorator" "%BASE%\02-structural\decorator\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Decorator) else (
-    java -cp "%OUT%\decorator" decorator.Main
-)
-
-:: --- Facade ---
-echo.
-echo [5/7] FACADE
-javac -d "%OUT%\facade" -sourcepath "%BASE%\02-structural\facade" "%BASE%\02-structural\facade\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Facade) else (
-    java -cp "%OUT%\facade" facade.Main
-)
-
-:: --- Flyweight ---
-echo.
-echo [6/7] FLYWEIGHT
-javac -d "%OUT%\flyweight" -sourcepath "%BASE%\02-structural\flyweight" "%BASE%\02-structural\flyweight\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Flyweight) else (
-    java -cp "%OUT%\flyweight" flyweight.Main
-)
-
-:: --- Proxy ---
-echo.
-echo [7/7] PROXY
-javac -d "%OUT%\proxy" -sourcepath "%BASE%\02-structural\proxy" "%BASE%\02-structural\proxy\*.java" 2>&1
-if errorlevel 1 (echo COMPILE ERROR - Proxy) else (
-    java -cp "%OUT%\proxy" proxy.Main
-)
-
-echo.
-echo ============================================================
-echo All structural patterns compiled and executed
-echo ============================================================
-pause

push-to-gitea.ps1

@@ -1,50 +0,0 @@
-$REMOTE = "https://ankurm.com/git.app/asmhatre/design-patterns.git"
-$BRANCH = "main"
-
-Set-Location $PSScriptRoot
-
-# Always run git init - it is safe and idempotent on an existing repo
-git init
-
-# Configure remote
-$existing = git remote get-url origin 2>$null
-if ($LASTEXITCODE -ne 0) {
-    git remote add origin $REMOTE
-    Write-Host "Added remote." -ForegroundColor Green
-} elseif ($existing.Trim() -ne $REMOTE) {
-    git remote set-url origin $REMOTE
-    Write-Host "Updated remote." -ForegroundColor Yellow
-} else {
-    Write-Host "Remote OK: $REMOTE" -ForegroundColor Cyan
-}
-
-# Create .gitignore if missing
-if (-not (Test-Path ".gitignore")) {
-    Set-Content ".gitignore" "out/`n*.class`nscreenshots/*.png`n*.b64.txt"
-    Write-Host "Created .gitignore" -ForegroundColor Green
-}
-
-# Stage and commit
-git add -A
-$status = git status --short
-
-if (-not $status) {
-    Write-Host "Nothing to commit - repo is up to date." -ForegroundColor Cyan
-    exit 0
-}
-
-Write-Host "`nFiles to commit:" -ForegroundColor Yellow
-Write-Host $status
-
-$timestamp = Get-Date -Format "yyyy-MM-dd"
-git commit -m "Add all 23 GoF design pattern implementations ($timestamp)"
-
-Write-Host "`nPushing to $REMOTE ..." -ForegroundColor Yellow
-git push -u origin $BRANCH
-
-if ($LASTEXITCODE -eq 0) {
-    Write-Host "`nDone! Code live at $REMOTE" -ForegroundColor Green
-} else {
-    Write-Host "`nPush failed. Try manually: git push -u origin main" -ForegroundColor Red
-    Write-Host "If prompted, enter your Gitea username and password." -ForegroundColor Yellow
-}

run-all.bat

@@ -1,80 +0,0 @@
-@echo off
-setlocal EnableDelayedExpansion
-
-set BASE=%~dp0
-set JAVAC="C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\javac.exe"
-set JAVA="C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\java.exe"
-set LOG=%BASE%output.log
-
-echo Design Patterns - Compile and Run > "%LOG%"
-echo Java: 17.0.7 (Eclipse Temurin) >> "%LOG%"
-echo ================================ >> "%LOG%"
-
-:: Create output dirs
-for %%P in (adapter bridge composite decorator facade flyweight proxy) do (
-    if not exist "%BASE%out\%%P" mkdir "%BASE%out\%%P"
-)
-
-:: Function-like subroutine to compile a package
-:: Usage: CALL :compile_pkg <package> <relative_src_dir>
-
-:: --- ADAPTER ---
-echo. >> "%LOG%"
-echo === ADAPTER === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\adapter\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\adapter" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\adapter" adapter.Main >> "%LOG%" 2>&1)
-
-:: --- BRIDGE ---
-echo. >> "%LOG%"
-echo === BRIDGE === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\bridge\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\bridge" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\bridge" bridge.Main >> "%LOG%" 2>&1)
-
-:: --- COMPOSITE ---
-echo. >> "%LOG%"
-echo === COMPOSITE === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\composite\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\composite" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\composite" composite.Main >> "%LOG%" 2>&1)
-
-:: --- DECORATOR ---
-echo. >> "%LOG%"
-echo === DECORATOR === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\decorator\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\decorator" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\decorator" decorator.Main >> "%LOG%" 2>&1)
-
-:: --- FACADE ---
-echo. >> "%LOG%"
-echo === FACADE === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\facade\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\facade" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\facade" facade.Main >> "%LOG%" 2>&1)
-
-:: --- FLYWEIGHT ---
-echo. >> "%LOG%"
-echo === FLYWEIGHT === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\flyweight\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\flyweight" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\flyweight" flyweight.Main >> "%LOG%" 2>&1)
-
-:: --- PROXY ---
-echo. >> "%LOG%"
-echo === PROXY === >> "%LOG%"
-set FILES=
-for %%f in ("%BASE%02-structural\proxy\*.java") do set FILES=!FILES! "%%f"
-%JAVAC% -d "%BASE%out\proxy" !FILES! >> "%LOG%" 2>&1
-if not errorlevel 1 (%JAVA% -cp "%BASE%out\proxy" proxy.Main >> "%LOG%" 2>&1)
-
-echo. >> "%LOG%"
-echo [DONE] >> "%LOG%"
-
-notepad "%LOG%"

run-behavioral.ps1

@@ -1,62 +0,0 @@
-$JAVAC = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\javac.exe'
-$JAVA  = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\java.exe'
-$BASE  = 'C:\Users\Ankur\Claude\Projects\@ankurm Blog\design-patterns'
-$OUTDIR = "$BASE\screenshots"
-
-New-Item -Force -ItemType Directory $OUTDIR | Out-Null
-
-$patterns = @(
-  @{dir="chain-of-responsibility"; pkg="chain";    main="chain.Main"},
-  @{dir="command";                 pkg="command";  main="command.Main"},
-  @{dir="iterator";                pkg="iterator"; main="iterator.Main"},
-  @{dir="mediator";                pkg="mediator"; main="mediator.Main"},
-  @{dir="memento";                 pkg="memento";  main="memento.Main"},
-  @{dir="observer";                pkg="observer"; main="observer.Main"},
-  @{dir="state";                   pkg="state";    main="state.Main"},
-  @{dir="strategy";                pkg="strategy"; main="strategy.Main"},
-  @{dir="template-method";         pkg="template"; main="template.Main"},
-  @{dir="visitor";                 pkg="visitor";  main="visitor.Main"}
-)
-
-$allOk = $true
-
-foreach ($p in $patterns) {
-  $label = $p.dir.ToUpper()
-  Write-Host "`n=== $label ===" -ForegroundColor Cyan
-
-  $srcDir = "$BASE\03-behavioral\$($p.dir)"
-  $outDir = "$BASE\out\$($p.pkg)"
-  New-Item -Force -ItemType Directory $outDir | Out-Null
-
-  $files = @(Get-ChildItem "$srcDir\*.java" | Select-Object -ExpandProperty FullName)
-
-  if ($files.Count -eq 0) {
-    Write-Host "[SKIP] No .java files in $srcDir" -ForegroundColor Yellow
-    continue
-  }
-
-  $compileOut = & $JAVAC -d $outDir @files 2>&1
-  if ($LASTEXITCODE -ne 0) {
-    Write-Host "[FAIL] $label compile error:" -ForegroundColor Red
-    $compileOut | ForEach-Object { Write-Host "  $_" -ForegroundColor Red }
-    $allOk = $false
-    continue
-  }
-
-  Write-Host "[OK] Compiled $($p.dir)" -ForegroundColor Green
-
-  $logFile = "$OUTDIR\$($p.pkg)-output.txt"
-  $runOut = & $JAVA -cp $outDir $($p.main) 2>&1
-  $runOut | Out-File -FilePath $logFile -Encoding utf8
-  $runOut | ForEach-Object { Write-Host $_ }
-  Write-Host "[SAVED] $logFile" -ForegroundColor DarkGray
-}
-
-Write-Host "`n============================================" -ForegroundColor Yellow
-if ($allOk) {
-  Write-Host "All 10 behavioral patterns compiled and ran OK" -ForegroundColor Green
-} else {
-  Write-Host "Some patterns had errors - check output above" -ForegroundColor Red
-}
-Write-Host "Output files: $OUTDIR" -ForegroundColor Yellow
-Read-Host "`nPress Enter to close"

run-structural.ps1

@@ -1,61 +0,0 @@
-$JAVAC = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\javac.exe'
-$JAVA  = 'C:\Program Files\Eclipse Adoptium\jdk-17.0.7.7-hotspot\bin\java.exe'
-$BASE  = 'C:\Users\Ankur\Claude\Projects\@ankurm Blog\design-patterns'
-$OUTDIR = "$BASE\screenshots"
-
-New-Item -Force -ItemType Directory $OUTDIR | Out-Null
-
-$patterns = @(
-  @{dir="adapter";   main="adapter.Main"},
-  @{dir="bridge";    main="bridge.Main"},
-  @{dir="composite"; main="composite.Main"},
-  @{dir="decorator"; main="decorator.Main"},
-  @{dir="facade";    main="facade.Main"},
-  @{dir="flyweight"; main="flyweight.Main"},
-  @{dir="proxy";     main="proxy.Main"}
-)
-
-$allOk = $true
-
-foreach ($p in $patterns) {
-  $label = $p.dir.ToUpper()
-  Write-Host "`n=== $label ===" -ForegroundColor Cyan
-
-  $srcDir = "$BASE\02-structural\$($p.dir)"
-  $outDir = "$BASE\out\$($p.dir)"
-  New-Item -Force -ItemType Directory $outDir | Out-Null
-
-  $files = @(Get-ChildItem "$srcDir\*.java" | Select-Object -ExpandProperty FullName)
-
-  if ($files.Count -eq 0) {
-    Write-Host "[SKIP] No .java files in $srcDir" -ForegroundColor Yellow
-    continue
-  }
-
-  # Compile
-  $compileOut = & $JAVAC -d $outDir @files 2>&1
-  if ($LASTEXITCODE -ne 0) {
-    Write-Host "[FAIL] $label compile error:" -ForegroundColor Red
-    $compileOut | ForEach-Object { Write-Host "  $_" -ForegroundColor Red }
-    $allOk = $false
-    continue
-  }
-
-  Write-Host "[OK] Compiled $($p.dir)" -ForegroundColor Green
-
-  # Run and save to per-pattern file
-  $logFile = "$OUTDIR\$($p.dir)-output.txt"
-  $runOut = & $JAVA -cp $outDir $($p.main) 2>&1
-  $runOut | Out-File -FilePath $logFile -Encoding utf8
-  $runOut | ForEach-Object { Write-Host $_ }
-  Write-Host "[SAVED] $logFile" -ForegroundColor DarkGray
-}
-
-Write-Host "`n============================================" -ForegroundColor Yellow
-if ($allOk) {
-  Write-Host "All 7 structural patterns compiled and ran OK" -ForegroundColor Green
-} else {
-  Write-Host "Some patterns had errors - check output above" -ForegroundColor Red
-}
-Write-Host "Output files: $OUTDIR" -ForegroundColor Yellow
-Read-Host "`nPress Enter to close"