工厂方法设计模式

public abstract class Factory {
    public abstract  T createProduct(Class clazz);
}

public abstract class Product {
    public  abstract  void method();
}

public class ConcreteFactory extends Factory{

    Product product=null;
    @Override
    public  T createProduct(Class clazz){
        try {
            product=(Product) Class.forName(clazz.getName()).getConstructor().newInstance();
        }
        catch (Exception e){
            e.printStackTrace();
        }
        return (T)product;
    }
}

public class ConcreteProduct extends Product{
    @Override
    public void method() {
        System.out.println("hello world");
    }
}

public class Test {
    public static void main(String[] args){
        try {
            Factory factory=new ConcreteFactory();
            Product product=factory.createProduct(ConcreteProduct.class);
            product.method();
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }
}