java中工厂模式

class Product 
{ 
    @Override 
    public String toString() { 
        return "Product"; 
    }  
} 
 
interface Builder 
{ 
    void BuildPart(); 
} 
 
class ConcreteBuilder implements Builder 
{ 
     
    @Override 
    public void BuildPart() { 
        // TODO Auto-generated method stub 
        System.out.println("Building Product's part"); 
    } 
     
    public Product GetResult() 
    { 
        System.out.println("Product's Building has finished"); 
        return new Product(); 
          
    } 
} 
 
class Director 
{ 
    public Product Construct(ConcreteBuilder cb) 
    { 
        cb.BuildPart(); 
        return cb.GetResult(); 
    } 
} 
 
public class TestModelBuilder { 
 
    /** 
     * @param args 
     */ 
    public static void main(String[] args) { 
        // TODO Auto-generated method stub 
        Director d=new Director(); 
        ConcreteBuilder cb=new ConcreteBuilder(); 
        Product p=d.Construct(cb); 
        System.out.println(p); 
    } 
} 

例子

class Car{ 
 
    @Override 
    public String toString() { 
        return "汽车产品"; 
    } 
} 
 
interface  IBuilder 
{ 
    void BuildWheel(); 
    void BuildCarFrame(); 
    void BuildEngine();  
} 
 
class CarBuilder implements IBuilder 
{ 
 
    private Car car=new Car(); 
    @Override 
    public void BuildCarFrame() { 
        // TODO Auto-generated method stub 
        System.out.println("建造汽车框架"); 
    } 
 
    @Override 
    public void BuildEngine() { 
        // TODO Auto-generated method stub 
        System.out.println("建造汽车轮子"); 
    } 
 
    @Override 
    public void BuildWheel() { 
        // TODO Auto-generated method stub 
        System.out.println("建造汽车引擎"); 
    } 
     
    public Car CarBuildOver() 
    { 
        System.out.println("汽车组装完毕"); 
        return car; 
    } 
} 
 
class CarDirector 
{ 
     
    public Car BuildCar(CarBuilder cb) 
    { 
        cb.BuildCarFrame(); 
        cb.BuildEngine(); 
        cb.BuildWheel(); 
        return cb.CarBuildOver(); 
    } 
} 
 
public class TestModelBuilder_1 { 
 
    /** 
     * @param args 
     */ 
    public static void main(String[] args) { 
        // TODO Auto-generated method stub 
        CarDirector cd=new CarDirector(); 
        Car c=cd.BuildCar(new CarBuilder()); 
        System.out.println(c); 
    } 
}