第一个博客：简单的工厂

决定开始写博客，为了能不断的学习，同时也方便回味学过的知识，万事开头难，先开始做起来！

package btp.oneP;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

//简单的工厂模式
public class RegisteredFactories {

public static void main(String[] args) {
for(int i=0;i<10;i++){
System.out.println(Part.createRandom());
}
}

}

//抽象工厂 -> 可返回一个特定类型的对象实例
interface Factory<T>{T create();}

class Part{
public String toString(){
return this.getClass().getSimpleName();
}
//工厂注册写在基类的好处：可以用自身类型来存储
static List<Factory<? extends Part>> partFactories =
new ArrayList<Factory<? extends Part>>();
static{
//工厂注册
//工厂注册最好写在基类中，类型比较好处理
partFactories.add(FuelFilter.factory());
partFactories.add(AirlFilter.factory());
partFactories.add(CabinAirlFilter.factory());
partFactories.add(OilFilter.factory());
partFactories.add(FanBelt.factory());
partFactories.add(GeneratorBelt.factory());
partFactories.add(PowerSteeringBelt.factory());
}
private static Random rand = new Random(47);
public static Part createRandom(){
int n = rand.nextInt(partFactories.size());
return partFactories.get(n).create();
}

}

class Filter extends Part{}

//每个类都能产生可以返回自身实例的工厂实例
class FuelFilter extends Filter{
public static Factory<FuelFilter> factory(){
return new Factory<FuelFilter>(){
@Override
public FuelFilter create() {
// TODO Auto-generated method stub
return new FuelFilter();
}
};
}
}

class AirlFilter extends Filter{
public static Factory<AirlFilter> factory(){
return new Factory<AirlFilter>(){
@Override
public AirlFilter create() {
// TODO Auto-generated method stub
return new AirlFilter();
}
};
}
}
class CabinAirlFilter extends Filter{
public static Factory<CabinAirlFilter> factory(){
return new Factory<CabinAirlFilter>(){
@Override
public CabinAirlFilter create() {
// TODO Auto-generated method stub
return new CabinAirlFilter();
}
};
}
}
class OilFilter extends Filter{
public static Factory<OilFilter> factory(){
return new Factory<OilFilter>(){
@Override
public OilFilter create() {
// TODO Auto-generated method stub
return new OilFilter();
}
};
}
}

class Belt extends Part{}

class FanBelt extends Belt{
public static Factory<FanBelt> factory(){
return new Factory<FanBelt>(){

@Override
public FanBelt create() {
// TODO Auto-generated method stub
return new FanBelt();
}

};
}
}

class GeneratorBelt extends Belt{
public static Factory<GeneratorBelt> factory(){
return new Factory<GeneratorBelt>(){

@Override
public GeneratorBelt create() {
// TODO Auto-generated method stub
return new GeneratorBelt();
}

};
}
}

class PowerSteeringBelt extends Belt{
public static Factory<PowerSteeringBelt> factory(){
return new Factory<PowerSteeringBelt>(){

@Override
public PowerSteeringBelt create() {
// TODO Auto-generated method stub
return new PowerSteeringBelt();
}

};
}
}