课堂练习4

课堂练习4：编写代码模拟手机与SIM卡的组合关系。要求：           SIM卡类负责创建SIM卡；           Phone类负责创建手机；          手机可以组合一个SIM卡；          手机可以更换其中的SIM卡。package PersonalComputer;public class PhoneDemo {    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        SIM sim1=new SIM();        SIM sim2=new SIM();        Phone phone =new Phone();        sim1.setSIMinfo("中国移动", "1388888888");        sim2.setSIMinfo("中国联通", "1315555555");              phone.setPhoneSIM(sim1);        System.out.println("此手机的SIM卡1信息为："+phone.getPhoneSIM().gettSIMinfo());              System.out.println(phone.call("15066666666"));              phone.setPhoneSIM(sim2);        System.out.println("此手机的SIM卡2信息为："+phone.getPhoneSIM().gettSIMinfo());              System.out.println(phone.call("17822222222"));    }}class SIM{    private String opertor;    private String  number;    public void setSIMinfo(String opertor,String number){        this.opertor=opertor;        this.number=number;    }    public String gettSIMinfo(){        return "SIM卡的运营商是："+opertor+"，卡号是："+number+"。";    }}class Phone{    private SIM phoneSIM;    public void setPhoneSIM(SIM phoneSIM){        this.phoneSIM=phoneSIM;    }    public SIM getPhoneSIM(){        return phoneSIM;    }    public String call(String  callnumber){        return  "正在打电话给："+callnumber;           }}