Java设计模式：抽像工厂模式

抽象工厂模式为工厂模式添加了一个抽象层，是创建其它工厂的超级工厂，也称为工厂的工厂。

Abstract Factory class diagram

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package client;

interface CPU
{
        void process();
}

interface CPUFactory
{
    CPU produceCPU();
}

class AMDFactory implements CPUFactory
{
    public CPU produceCPU()
    {
        return new AMDCPU();
    }
}

class IntelFactory implements CPUFactory
{
    public CPU produceCPU()
    {
        return new IntelCPU();
    }
}

class AMDCPU implements CPU
{
    public void process()
    {
        System.out.println("AMD is processing....");
    }
}

class IntelCPU implements CPU
{
    public void process()
    {
        System.out.println("Intel is processing...");
    }
}

class Computer
{
    CPU cpu;
    public Computer(CPUFactory factory)
    {
        cpu = factory.produceCPU();
        cpu.process();
    }
}

public class Client
{
    public static void main(String[] args)
    {
        new Computer(createSpecificFactory());
    }
    
    public static CPUFactory createSpecificFactory()
    {
        int sys = 0;
        if (sys == 0) return new AMDFactory();
        else return new IntelFactory();
    }
}