Factory Design Pattern

Author: DhirajGadekar

Creational Design Pattern/FactoryDesignPattern/.vscode/settings.json

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+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

Creational Design Pattern/FactoryDesignPattern/README.md

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+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

Creational Design Pattern/FactoryDesignPattern/bin/AndroidAppButton.class

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+public class AndroidAppButton implements Button {
+    
+    @Override
+    public void onDoubleTap() {
+
+        System.out.println("Android app use onDoubleTap Button");
+    }
+
+    @Override
+    public void onLongPressed() {
+        
+        System.out.println("Android app use onLongPressed Button");
+    }
+   
+    @Override
+    public void onPressed() {
+        
+        System.out.println("Android app use onPressed Button");
+    }
+}

Creational Design Pattern/FactoryDesignPattern/bin/App.class

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+public class App {
+    public static void main(String[] args) throws Exception {
+        
+        Button btn1 = ButtonFactory.createButton("Android");
+        btn1.onDoubleTap();
+        btn1.onLongPressed();
+        btn1.onPressed();
+
+        Button btn2 = ButtonFactory.createButton("ios");
+        btn2.onDoubleTap();
+        btn2.onLongPressed();
+        btn2.onPressed();
+
+        Button btn3 = ButtonFactory.createButton("web");
+        btn3.onDoubleTap();
+        btn3.onLongPressed();
+        btn3.onPressed();
+
+        // Button btn4 = ButtonFactory.createButton("Windows");
+        // btn4.onLongPressed();
+    }
+}

Creational Design Pattern/FactoryDesignPattern/bin/Button.class

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+public interface Button {
+    
+    void onDoubleTap();
+    void onPressed();
+    void onLongPressed();
+}

Creational Design Pattern/FactoryDesignPattern/bin/ButtonFactory.class

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+
+public class ButtonFactory {
+    
+    public static Button createButton(String appType) {
+
+        if(appType.trim().equalsIgnoreCase("Android")) {
+
+            return new AndroidAppButton();
+        } else if(appType.trim().equalsIgnoreCase("ios")) {
+
+            return new IOSAppButton();
+        } else if(appType.trim().equalsIgnoreCase("web")) {
+
+            return new WebAppButton();
+        }
+        throw new IllegalAppTypeException("Unsupported type");
+    } 
+}

Creational Design Pattern/FactoryDesignPattern/bin/IOSAppButton.class

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+public class IOSAppButton implements Button {
+    
+    @Override
+    public void onDoubleTap() {
+
+        System.out.println("ios app use onDoubleTap Button");
+    }
+
+    @Override
+    public void onLongPressed() {
+        
+        System.out.println("ios app use onLongPressed Button");
+    }
+   
+    @Override
+    public void onPressed() {
+        
+        System.out.println("ios app use onPressed Button");
+    }
+}

Creational Design Pattern/FactoryDesignPattern/bin/IllegalAppTypeException.class

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+public class IllegalAppTypeException extends RuntimeException {
+    
+    IllegalAppTypeException(String msg) {
+
+        super(msg);
+    }
+}

Creational Design Pattern/FactoryDesignPattern/bin/WebAppButton.class

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+public class WebAppButton implements Button{
+    
+    @Override
+    public void onDoubleTap() {
+
+        System.out.println("Web App use onDoubleTap Button");
+    }
+
+    @Override
+    public void onLongPressed() {
+        
+        System.out.println("Web App use onLongPressed Button");
+    }
+   
+    @Override
+    public void onPressed() {
+        
+        System.out.println("Web App use onPressed Button");
+    }
+}