Java设计模式：抽像工厂模式

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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();
}
}