Java实验三实验报告1

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：
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 student
{
String 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 xuanke
{
abstract void select(String s);
}
interface illegal
{
abstract void illegal(int s);
}
class primary extends student implements illegal
{
String xx;
primary(String xuehao,String xingming,String xingbie,int nianling,String banji,String xiaoxue)
{
super(xuehao,xingming,xingbie,nianling,banji);
}
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 xuanke
{
String 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_1
{
public 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.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.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.sex+" "+c1.age+" "+c1.bj+" "+c1.dx+" "+c1.xk+"\n");
}
}
实验结果：
题2源代码：
import java.util.*;
class bankcard
{
String kh,name;
double yue;
bankcard(String kahao,String yezhu,double shengyu) {
kh=kahao;
name=yezhu;
yue=shengyu;
}
}
interface touzhi
{
abstract void tz(double s);
abstract void tzye(double s);
abstract void illegal();
}
interface qkillegal
{
abstract void illegal();
}
class common extends bankcard implements qkillegal
common(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 touzhi
{
double 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_3
{
public static void main(String args[])
{
common c1=new common("62226200240001916658","张三",1200.00);
System.out.println("卡号:"+c1.kh+"业主:"++"余额:"+c1.yue);
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);
}
else
c1.illegal();
System.out.println("\n\n");
xinyongka x1=new xinyongka("62236200243008615559","李四",500.00);
System.out.println("卡号:"+x1.kh+"业主:"++"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。