组装一台电脑

计算机硬件接口类：

/**
 * @author Administrator
 *    CPU接口
 */
public interface CPU {
    public String getBand();
    public String getZhuPin();
}


/**
 * @author Administrator
 *    内存接口
 */
public interface Dimm {
    public String dimmSize();
}


/**
 * @author Administrator
 *    硬盘接口
 */
public interface SD {
    public String sdSize();
}

硬件生产商类：

/**
 * @author Administrator
 *    CPU生产商
 */
public class CPUpro implements CPU{

    public String getBand() {
        return "Intel";    
    }

    public String getZhuPin() {
        return "3.8GHz";    
    }

}


/**
 * @author Administrator
 *    内存生产商
 */
public class DimmPro implements Dimm{

    @Override
    public String dimmSize() {
        // TODO Auto-generated method stub
        return "4GB";
    }

}


/**
 * @author Administrator
 *    硬盘生产商
 */
public class SDpro implements SD{
    @Override
    public String sdSize() {
        return "3000GB";
    }
}

计算机类：

/**
 * @author Administrator
 *    计算机类
 */
public class Computer {
    private CPU cpu;
    private SD sd;
    private Dimm dimm;
    
    public Computer() {}
    public Computer(CPU cpu, SD sd, Dimm dimm) {
        super();
        this.cpu = cpu;
        this.sd = sd;
        this.dimm = dimm;
    }
    
    
    public void print() {
        System.out.println("计算机的信息如下：");
        System.out.println("CPU的品牌是："+cpu.getBand()+",主频是："+cpu.getZhuPin());
        System.out.println("硬盘容量是："+sd.sdSize());
        System.out.println("内存容量是："+dimm.dimmSize());
    }
    
    public CPU getCpu() {
        return cpu;
    }
    public void setCpu(CPU cpu) {
        this.cpu = cpu;
    }
    public SD getSd() {
        return sd;
    }
    public void setSd(SD sd) {
        this.sd = sd;
    }
    public Dimm getDimm() {
        return dimm;
    }
    public void setDimm(Dimm dimm) {
        this.dimm = dimm;
    }
    
}

测试类：

public class Text {
    public static void main(String[] args) {
        CPU cpu = new CPUpro();
        SD sd = new SDpro();
        Dimm dimm = new DimmPro();
        Computer computer = new Computer(cpu,sd,dimm);
        computer.print();
    }
}

运行结果：