Java版简单工厂模式

1、ICPU.java 接口，定义公共方法Calculate

package cn.javass.dp.abstractfactory.example1;
/**
* CPU的接口
*/
public interface ICPU
{
    /**
     * 示意方法，CPU具有运算的功能
     */
    public void Calculate();
}

2、详细CPU类

IntelCPU.java

package cn.javass.dp.abstractfactory.example1;
/**
* Intel的CPU实现
*/
public class IntelCPU implements ICPU
{
    /**
     * CPU的针脚数目
     */
    private int pins = 0;
    /**
     * 构造方法，传入CPU的针脚数目
     * @param pins
     *            CPU的针脚数目
     */
    public IntelCPU(int pins)
    {
        this.pins = pins;
    }
    public void Calculate()
    {
        System.out.println("now in Intel CPU,pins=" + pins);
    }
}

AMDCPU.java

package cn.javass.dp.abstractfactory.example1;
/**
* AMD的CPU实现
*/
public class AMDCPU implements ICPU
{
    /**
     * CPU的针脚数目
     */
    private int pins = 0;
    /**
     * 构造方法，传入CPU的针脚数目
     *
     * @param pins
     *            CPU的针脚数目
     */
    public AMDCPU(int pins)
    {
        this.pins = pins;
    }
    public void Calculate()
    {
        System.out.println("now in AMD CPU,pins=" + pins);
    }
}

3、CPU工厂类

CPUFactory.java

package cn.javass.dp.abstractfactory.example1;
/**
* 创建CPU的简单工厂
*/
public class CPUFactory
{
    /**
     * 创建CPU接口对象的方法
     *
     * @param type
     *            选择CPU类型的参数
     * @return CPU接口对象的方法
     */
    public static ICPU CreateCPU(int type)
    {
        ICPU cpu = null;
        // 根据参数来选择并创建相应的CPU对象
        if (type == CpuType.INTEL)
        {
            cpu = new IntelCPU(1156);
        } else if (type == CpuType.AMD)
        {
            cpu = new AMDCPU(939);
        }
        return cpu;
    }
}

4、工具、client类

CpuType.java

package cn.javass.dp.abstractfactory.example1;
public class CpuType
{
    public static int INTEL = 1;
    public static int AMD = 2;
}

Client.java

package cn.javass.dp.abstractfactory.example1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Client
{
    public static void main(String[] args) throws IOException
    {
        int cpuType = 0;
        ICPU cpu = null;
         System.out.print("Starting ....... \n");

        for(;;)
        {
            InputStreamReader isr=new InputStreamReader(System.in);
            BufferedReader br=new BufferedReader(isr);
            //if(br.readLine().equalsIgnoreCase(""))
            //    continue;

            cpuType = Integer.parseInt(br.readLine());
            if(cpuType == CpuType.AMD)
            {
                cpu = CPUFactory.CreateCPU(cpuType);
                cpu.Calculate();
                System.out.print("--------------------------------------\n");
            }

            if(cpuType == CpuType.INTEL)
            {
                cpu = CPUFactory.CreateCPU(cpuType);
                cpu.Calculate();
                System.out.print("--------------------------------------\n");
            }
        }

    }
}

 

参考文献：

《研磨设计模式》王斌、陈臣