联通JAVA_Java 中国移动、中国联通

package mypackage;

public abstract class SIM {

public abstract void setNumber(String n);

public abstract String giveNumber();

public abstract String giveCorpName();

}

package mypackage;

public class MobileTelephone {

SIM card;

public void useSIM(SIM card){

this.card=card;

}

public void showMess(){

System.out.println("使用的卡是："+card.giveCorpName()+"提供的");

System.out.println("手机号码是："+card.giveNumber());

}

}

package mypackage;

public class SIMOfChinaMobile extends SIM{

String number;

public void setNumber(String n){

number=n;

}

public String giveNumber(){

return number;

}

public String giveCorpName(){

return "中国移动";

}

}

package mypackage;

public class SIMOfChinaUnicom extends SIM{

String number;

public void setNumber(String n){

number=n;

}

public String giveNumber(){

return number;

}

public String giveCorpName(){

return "中国联通";

}

}

package mypackage;

public class Test {

public static void main(String[] args) {

MobileTelephone telephone=new MobileTelephone();

SIM sim=new SIMOfChinaMobile();

sim.setNumber("13887656432");

telephone.useSIM(sim);

telephone.showMess();

sim=new SIMOfChinaUnicom();

sim.setNumber("13097656437");

telephone.useSIM(sim);

telephone.showMess();

}

}