Java设计模式：抽象工厂

抽象工厂模式为工厂模式增加了另一层抽象。如果将“抽象工厂”与“工厂”进行比较，则很明显会添加新的抽象层。抽象工厂是创建其他工厂的超级工厂。我们可以称其为“工厂工厂”。

抽象工厂类图

抽象工厂Java代码

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; // based on specific requirement
        if (sys == 0) 
        	return new AMDFactory();
        else 
        	return new IntelFactory();
    }
}