Java实验三实验报告(共7页).doc
精选优质文档-倾情为你奉上淮海工学院计算机工程学院实验报告书课程名：Java语言实验与课程设计指导 题 目： 实验3深入面向对象编程 班 级： 学 号： 姓 名： 评语：成绩： 指导教师： 批阅时间： 年 月 日专心-专注-专业实验题目：1. 定义一个学生类，定义一个大学生类和小学生类，这两个类是学生类的子类；定义一个选课接口，由大学生类实现该接口，定义一个年龄异常处理，当小学生年龄小于7岁时，弹出异常。2. 定义一个银行卡类，定义一个信用卡类和普通银行卡类，这两个类是银行卡类的子类；定义一个透支的接口，信用卡可以透支，普通银行卡不可以透支。定义一个取款异常和透支异常，当普通银行卡取款超过银行卡余额时，弹出“取款异常”；当信用卡透支超过2万元时弹出“透支异常”。实验代码：题1源代码：import java.awt.*;class studentString number,name,sex,bj;int age;student(String xuehao,String xingming,String xingbie,int nianling,String banji)number=xuehao;name=xingming;sex=xingbie;age=nianling;bj=banji;interface xuankeabstract void select(String s);interface illegalabstract void illegal(int s);class primary extends student implements illegalString xx;primary(String xuehao,String xingming,String xingbie,int nianling,String banji,String xiaoxue)super(xuehao,xingming,xingbie,nianling,banji);xx=xiaoxue;public void illegal(int s)age=s;if(age<7)System.out.println("n出错学生 "+name+" 的年龄过小！");class college extends student implements xuankeString dx,xk;college(String xuehao,String xingming,String xingbie,int nianling,String banji,String daxue)super(xuehao,xingming,xingbie,nianling,banji);dx=daxue;public void select(String s)xk=s;public class test_1public static void main(String args) primary p1=new primary("1","张三","男",13,"五(1)班","ZZZ小学"); System.out.println(p1.number+" "+p1.name+" "+p1.sex+" "+p1.age+" "+p1.bj+" "+p1.xx); p1.illegal(p1.age); primary p2=new primary("n2","小红","女",6,"一(1)班","YYY小学"); System.out.println(p2.number+" "+p2.name+" "+p2.sex+" "+p2.age+" "+p2.bj+" "+p2.xx); p2.illegal(p2.age); college c1=new college("3","小茗","女",20,"软件112","XXX大学"); c1.select("现代密码学"); System.out.print("n"+c1.number+" "+c1.name+" "+c1.sex+" "+c1.age+" "+c1.bj+" "+c1.dx+" "+c1.xk+"n");实验结果：题2源代码：import java.util.*;class bankcardString kh,name;double yue;bankcard(String kahao,String yezhu,double shengyu)kh=kahao;name=yezhu;yue=shengyu;interface touzhiabstract void tz(double s);abstract void tzye(double s);abstract void illegal();interface qkillegalabstract void illegal();class common extends bankcard implements qkillegalcommon(String kahao,String yezhu,double shengyu)super(kahao,yezhu,shengyu);public void warning()System.out.println("普通银行卡不可透支！");public void illegal()System.out.println("取款超额！");class xinyongka extends bankcard implements touzhidouble tzye;xinyongka(String kahao,String yezhu,double shengyu)super(kahao,yezhu,shengyu);public void tz(double s)tzye=s;public void tzye(double s) double t=20000+yue-s;if(s>yue)System.out.println(t);public void illegal()System.out.println("透支超额！");public class test_3public static void main(String args)common c1=new common("","张三",1200.00);System.out.println("卡号:"+c1.kh+"业主:"+c1.name+"余额:"+c1.yue);c1.warning();System.out.println("请输入取款金额:");Scanner s1=new Scanner(System.in);double b=s1.nextDouble();if(b<c1.yue)double c=c1.yue-b;System.out.println("银行卡余额为:"+c);elsec1.illegal(); System.out.println("nn");xinyongka x1=new xinyongka("","李四",500.00);System.out.println("卡号:"+x1.kh+"业主:"+x1.name+"余额:"+x1.yue);System.out.println("信用卡可透支！透支金额为20000元！");System.out.println("请输入要取款金额:");Scanner s2=new Scanner(System.in);double a=s2.nextDouble();if(a<=x1.yue) double d=x1.yue-a; System.out.println("银行卡余额为:"+d); else if(a>x1.yue&&a<=(20000+x1.yue) System.out.println("透支余额剩余:"); x1.tzye(a); else x1.illegal();实验结果：普通银行卡类：输入普通银行卡取款金额若输入金额小于余额 则若大于余额则信用卡类：输入取款金额，若输入金额小于余额 则若输入金额大于余额小于透支金额与余额之和，则若大于透支金额与余额之和，则
