"Simple Factory" vs "Factory Method" vs "Abstract Factory" vs "Reflect"

ref: http://www.cnblogs.com/zhangchenliang/p/3700820.html

1. "Simple Factory"

package torv.abc;

public class HelloMain {

    public static void main(String[] args) {
        Driver.createCar("audi").drive();
    }
}

//====================================================== product car

abstract class Car {
    private String brand;

    public abstract void drive();

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brandName) {
        brand = brandName;
    }
}

//------------------------------------------------benz
class BenzCar extends Car {
    public BenzCar() {
        setBrand("Benz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--go-----");
    }
}

//------------------------------------------------bmw
class BmwCar extends Car {
    public BmwCar() {
        setBrand("Bmw");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--go-----");
    }
}

//------------------------------------------------audi
class AudiCar extends Car {
    public AudiCar() {
        setBrand("Audi");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--go-----");
    }
}

//====================================================== factory

class Driver {
    public static Car createCar(String carName) {
        Car car = null;

        if (carName.equalsIgnoreCase("benz")) {
            car = new BenzCar();
        } else if (carName.equalsIgnoreCase("bmw")) {
            car = new BmwCar();
        } else if (carName.equalsIgnoreCase("audi")) {
            car = new AudiCar();
        }

        return car;
    }
}

2. "Factory Method"

package torv.abc;

public class HelloMain {

    public static void main(String[] args) {
        Driver driver = new BmwDriver();
        driver.createCar().drive();
    }
}

//====================================================== product car

abstract class Car {
    private String brand;

    public abstract void drive();

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brandName) {
        brand = brandName;
    }
}

//------------------------------------------------benz
class BenzCar extends Car {
    public BenzCar() {
        setBrand("Benz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand()+"--go-----");
    }
}

//------------------------------------------------bmw
class BmwCar extends Car {
    public BmwCar() {
        setBrand("Bmw");
    }

    @Override
    public void drive() {
        System.out.println(getBrand()+"--go-----");
    }
}

//------------------------------------------------audi
class AudiCar extends Car {
    public AudiCar() {
        setBrand("Audi");
    }

    @Override
    public void drive() {
        System.out.println(getBrand()+"--go-----");
    }
}

//====================================================== factory

abstract class Driver {
    public abstract Car createCar();
}

class BenzDriver extends Driver{

    @Override
    public Car createCar() {
        return new BenzCar();
    }

}

class BmwDriver extends Driver{

    @Override
    public Car createCar() {
        return new BmwCar();
    }

}

class AudiDriver extends Driver{

    @Override
    public Car createCar() {
        return new AudiCar();
    }

}

3. "Abstract Factory"

package torv.abc;

public class HelloMain {

    public static void main(String[] args) {
        Driver driver = new SportDriver();
        driver.createAudiCar().drive();
    }
}

//====================================================== product car

abstract class Car {
    private String brand;
    private String kind;

    public abstract void drive();

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brandName) {
        brand = brandName;
    }

    public String getKind() {
        return kind;
    }

    public void setKind(String kindName) {
        kind = kindName;
    }
}

//------------------------------------------------benz
abstract class BenzCar extends Car {
    public BenzCar() {
        setBrand("Benz");
    }
}

class BenzSportCar extends BenzCar {

    public BenzSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class BenzBizCar extends BenzCar {

    public BenzBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//------------------------------------------------bmw
abstract class BmwCar extends Car {
    public BmwCar() {
        setBrand("Bmw");
    }
}

class BmwSportCar extends BmwCar {

    public BmwSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class BmwBizCar extends BmwCar {

    public BmwBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//------------------------------------------------audi
abstract class AudiCar extends Car {
    public AudiCar() {
        setBrand("Audi");
    }
}

class AudiSportCar extends AudiCar {

    public AudiSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class AudiBizCar extends AudiCar {

    public AudiBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//====================================================== factory

abstract class Driver {
    public abstract Car createBenzCar();

    public abstract Car createBmwCar();

    public abstract Car createAudiCar();
}

class SportDriver extends Driver {

    @Override
    public Car createBenzCar() {
        return new BenzSportCar();
    }

    @Override
    public Car createBmwCar() {
        return new BmwSportCar();
    }

    @Override
    public Car createAudiCar() {
        return new AudiSportCar();
    }
}

class BizDriver extends Driver {

    @Override
    public Car createBenzCar() {
        return new BenzBizCar();
    }

    @Override
    public Car createBmwCar() {
        return new BmwBizCar();
    }

    @Override
    public Car createAudiCar() {
        return new AudiBizCar();
    }

}

3. "Simple Factory" + Reflect

package torv.abc;

public class HelloMain {

    public static void main(String[] args) {
        try {
            Driver.createCar("torv.abc.BenzSportCar").drive();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

//====================================================== product car

abstract class Car {
    private String brand;
    private String kind;

    public abstract void drive();

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brandName) {
        brand = brandName;
    }

    public String getKind() {
        return kind;
    }

    public void setKind(String kindName) {
        kind = kindName;
    }
}

//------------------------------------------------benz
abstract class BenzCar extends Car {
    public BenzCar() {
        setBrand("Benz");
    }
}

class BenzSportCar extends BenzCar {

    public BenzSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class BenzBizCar extends BenzCar {

    public BenzBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//------------------------------------------------bmw
abstract class BmwCar extends Car {
    public BmwCar() {
        setBrand("Bmw");
    }
}

class BmwSportCar extends BmwCar {

    public BmwSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class BmwBizCar extends BmwCar {

    public BmwBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//------------------------------------------------audi
abstract class AudiCar extends Car {
    public AudiCar() {
        setBrand("Audi");
    }
}

class AudiSportCar extends AudiCar {

    public AudiSportCar() {
        setKind("Sport");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

class AudiBizCar extends AudiCar {

    public AudiBizCar() {
        setKind("Biz");
    }

    @Override
    public void drive() {
        System.out.println(getBrand() + "--" + getKind() + "--go-------");
    }

}

//====================================================== factory

abstract class Driver {
    public static Car createCar(String name) throws Exception{
        return (Car) Class.forName(name).newInstance();
    }
}