查询余额的时候总是有,您的账户已销毁,其他的查询都是对的。
package 第二次上机实验JAVA;
import java.util.Scanner;
public class Account { //声明Account类
private String id; //账号
private String name;//姓名
private double balance;
//账户里的余额
private String identitycard;//身份证号码
private String opentime;
//构造方法,开户
public Account(String id,String name,String opentime,String identitycard,double balance)
{
this.id=id;
this.name=name;
this.balance=balance;
this.identitycard=identitycard;
this.opentime=opentime;
System.out.println("开户成功!\n"+this.name+"欢迎您!");
}
//账户注销
public void destroy() //finalize
{
System.out.println(this.name+"您的账户已销毁!");
}
//开始向账户里存钱,若金额>0就存
public void income(double money){
if(money>0){
this.balance=this.balance+money;
System.out.println("存款成功!");
}else
System.out.println("存款失败!");
}
//开始从账户里取钱
public void takeout(double money){
if(money<=this.balance){
this.balance=this.balance-money;
System.out.println("取款成功!");
}else
System.out.println("余额不足,取款失败!");
}
public void showbalance()//显示余额
{
System.out.println("余额为:"+this.balance);
}
public void show(){
System.out.println("您的开户信息为:\n账号:"+this.id+"开户时间:\t"+this.opentime+"身份证号码:\t"+this.identitycard);
}
public static void main(String[] args) {
// TODO 自动生成的方法存根
Account a = new Account("0001\n","小明","2019-10-01\n","32112xxxxxxxxxxxx\n",520000);
a.show();
System.out.println("请选择操作:0 退出,1 存款,2 取款,3 查询余额,4 注销账号");
while(true)
{
Scanner sc = new Scanner(System.in);
int i=sc.nextInt();
switch(i){
case 0:
System.out.println("欢迎下次光临!");
System.exit(0);
break;
case 1:
System.out.println("请输入存款金额:");
double money1=sc.nextInt();
a.income(money1);
break;
case 2:
System.out.println("请输入取款金额:");
double money2=sc.nextInt();
a.takeout(money2);
break;
case 3:
a.showbalance();
case 4:
a.destroy();
}
}
}
}