抽象类实验：SIM卡抽象

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抽象SIM:

package sim_package;public abstract class SIM {public abstract String giveNumber();public abstract String giveCorpName();public abstract void setNumber(String n);}

SIM子类：

package sim_package;public class SIMOFChinaMobile extends SIM{String phonenumber;public SIMOFChinaMobile(){phonenumber="";}public SIMOFChinaMobile(String phonenumber){this.phonenumber=phonenumber;} public String giveNumber(){ return phonenumber; } public String giveCorpName(){ return "中国移动"; } public void setNumber(String phonenumber){ this.phonenumber=phonenumber; }}

SIM子类：

package sim_package;public class SIMOFChinaUnicom extends SIM {String phonenumber;public SIMOFChinaUnicom(){phonenumber="";}public SIMOFChinaUnicom(String phonenumber){this.phonenumber=phonenumber;} public String giveNumber(){ return phonenumber; } public String giveCorpName(){ return "中国联通"; } public void setNumber(String phonenumber){ this.phonenumber=phonenumber; }}

手机类：

package Mobile_telephone;import sim_package.*;public class Mobiletelephone {SIM card;public Mobiletelephone(){}public Mobiletelephone(SIM card){this.card=card;}public void useSIM(SIM card){System.out.println("运营商:"+card.giveCorpName());System.out.println("手机号:"+card.giveNumber());}}

主程序：

import Mobile_telephone.*;import sim_package.*;public class Application {public static void main(String[] args) {SIM sim=new SIMOFChinaUnicom();sim.setNumber("13887656432");Mobiletelephone phone=new Mobiletelephone();phone.useSIM(sim);sim=new SIMOFChinaMobile();sim.setNumber("13097656437");phone.useSIM(sim);}}

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