本文实例为大家分享了java实现简单的ATM项目的具体代码,供大家参考,具体内容如下 首先要了解的是,这个ATM项目本身是一个轻量级的项目,只为了完成一些ATM具备的一些方法,并非
本文实例为大家分享了java实现简单的ATM项目的具体代码,供大家参考,具体内容如下
首先要了解的是,这个ATM项目本身是一个轻量级的项目,只为了完成一些ATM具备的一些方法,并非是真正完成一个ATM的全部功能和需求
那么在这个轻量级的ATM项目中,我将完成添加储蓄账号,添加信用账户,提款,取款等基本功能。
适合新手查看,需要掌握java的继承,多态,封装等基本技术能力
那么,首先创建如下的对象类:Account(账户类),Bank(银行类),CreditAccount(信用账户),SavingAccount(储蓄账户类);
大家首先应该搞清楚,这些类文件中之间的关系,每个类之间需要用到什么样的方法;
那么我们先填写Account类
package com.atm.entity; /** * 银行账户类 */ public abstract class Account { /** * 账户帐号 */ private String accountId; /** * 账户姓名 */ private String accountName; /** * 账户密码 */ private String accountPwd; /** * 账户余额 */ private double accountBalance; /** * 账户身份证号 */ private String accountPersonId; /** * 账户邮箱 */ private String accountEmail; /** * 账户联系电话 */ private long accountTelno; public Account() { } public Account(String accountName, String accountPwd, String accountPersonId, long accountTelno, String accountEmail) { this.accountName = accountName; this.accountPwd = accountPwd; this.accountPersonId = accountPersonId; this.accountTelno = accountTelno; this.accountEmail = accountEmail; } public String getAccountId() { return accountId; } public void setAccountId(String accountId) { this.accountId = accountId; } public String getAccountName() { return accountName; } public void setAccountName(String accountName) { this.accountName = accountName; } public String getAccountPwd() { return accountPwd; } public void setAccountPwd(String accountPwd) { this.accountPwd = accountPwd; } public double getAccountBalance() { return accountBalance; } public void setAccountBalance(double accountBalance) { this.accountBalance = accountBalance; } public String getAccountPersonId() { return accountPersonId; } public void setAccountPersonId(String accountPersonId) { this.accountPersonId = accountPersonId; } public String getAccountEmail() { return accountEmail; } public void setAccountEmail(String accountEmail) { this.accountEmail = accountEmail; } public long getAccountTelno() { return accountTelno; } public void setAccountTelno(long accountTelno) { this.accountTelno = accountTelno; } /** * 存款 * * @param money * 存款金额 * @return 返回账户余额 */ public double depoist(double money) {// money 形式参数 if (money > 0) this.accountBalance += money; return this.accountBalance; } /** * 取款 * * @param money * 取款金额 * @return 返回账户余额 */ public abstract double withdraw(double money); /** * 转账 * * @param anotherAccount * 转账的对方账户 * @param money * 转账金额 * @return 返回当前账户的余额 */ public double tranferAccount(Account anotherAccount, double money) {// 形参 anotherAccount.accountBalance += money; this.accountBalance -= money; return this.accountBalance; } }
之后填写信用账户类CreditAccount;我们应该明白,他是继承Account类的,但是,他又需要拥有自身独立的属性,我们可以添加一个最高透支额度的属性
这样来实现代码
/** * 信用账户 * * */ public class CreditAccount extends Account { //成员变量 private double maxOverdraw;//最高透支额度 //构造函数 public CreditAccount(String accountName,String accountPwd,String accountPersonId,long accountTelno,String accountEmail,double maxOverdraw){ super( accountName, accountPwd, accountPersonId, accountTelno, accountEmail); this.maxOverdraw = maxOverdraw; } //set,get public void setMaxOverdraw(double maxOverdraw ){ this.maxOverdraw = maxOverdraw; } public double getMaxOverdraw(){ return this.maxOverdraw; } @Override public double withdraw(double money) { // TODO Auto-generated method stub return 0; } }
同理 填写储蓄账户(SavingAccount)类文件
package com.atm.entity; /** * 储蓄账户 * * */ public class SavingAccount extends Account { public SavingAccount(String accountName,String accountPwd,String accountPersonId,long accountTelno,String accountEmail){ super( accountName, accountPwd, accountPersonId, accountTelno, accountEmail); } @Override public double withdraw(double money) { // TODO Auto-generated method stub if(money <= getAccountBalance()){ } else System.out.println("账户余额不足"); return getAccountBalance(); } }
最重要的是填写Bank类的内容,在这个类中,我们要完成注册,产生银行账户,统计所有信用账户的最高透支额度的总和,统计所有账户的总余额, 查询出所有信用账户中透支额度最高的账户, 查询出所有储蓄账户中余额最高的账户等功能
我们这样填写
package com.atm.entity; import java.text.SimpleDateFormat; import java.util.Date; /** * 银行类 * * @author qianghj * * 银行开户 ----> 银行账户 Account account = bank.开户(...) * */ public class Bank { public Account[] accArray = new Account[2000]; public int count = 0;// 表示银行账户的个数 /** * 银行账户开户 * * @param accName * 用户名称 * @param accPwd * 用户密码 * @param accPersonId * 用户身份证 * @param accTelno * 用户手机号码 * @param accEmail * 用户邮箱 * @param accountType * 账户类型 0: 储蓄账户 1 : 信用账户 * @param maxOverdraw * 信用账户的最高透支额度 * @return 返回有效的银行账户 */ public Account registAccount(String accName, String accPwd, String accPersonId, long accTelno, String accEmail, int accountType, double maxOverdraw) { Account account = null; if (accountType == 0) account = new SavingAccount(accName, accPwd, accPersonId, accTelno, accEmail); else account = new CreditAccount(accName, accPwd, accPersonId, accTelno, accEmail, maxOverdraw); account.setAccountId(generateNextAccountId()); accArray[count++] = account; return account; } /** * 产生银行账户帐号 * * @return 返回下一个账户的帐号 1,2,3,,4 */ public String generateNextAccountId() { return "62223421" + new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()); } // 统计所有信用账户的最高透支额度的总和 (1050 ) 2000 , 1050 public double statisticsCreditAccountMaxoverdrawSum() { double sum = 0; for (int i = 0; i < count; i++) { // 判断账户 是不是 CreditAccount类型 if (accArray[i] instanceof CreditAccount) { CreditAccount creditAcc = (CreditAccount) accArray[i]; sum += creditAcc.getMaxOverdraw(); } } return sum; } // 统计所有账户的总余额 public double aggregateAamount() { double sum = 0; for (int i = 0; i < count; i++) { if (accArray[i] instanceof SavingAccount) { SavingAccount savingAccount = (SavingAccount) accArray[i]; sum += savingAccount.getAccountBalance(); } } return sum; } // 查询出所有信用账户中透支额度最高的账户 public double maxLimit() { double tem = 0; for (int i = 0; i < count; i++) { if (accArray[i] instanceof CreditAccount) { CreditAccount creditAccount = (CreditAccount) accArray[i]; if (creditAccount.getMaxOverdraw() > tem) { tem = creditAccount.getMaxOverdraw(); } } } return tem; } // 查询出所有储蓄账户中余额最高的账户 public double maxBalance() { double tem = 0; for (int i = 0; i < count; i++) { if (accArray[i] instanceof SavingAccount) { SavingAccount savingAccount = (SavingAccount) accArray[i]; if (savingAccount.getAccountBalance() > tem) { tem = savingAccount.getAccountBalance(); } } } return tem; } }
最后测试类
package test; import org.junit.Test; import com.atm.entity.Account; import com.atm.entity.Bank; import com.atm.entity.CreditAccount; public class TestAccount { @Test public void testRegist() { Bank bank = new Bank(); for (int i = 0; i < 1000; i++) { // 0: 储蓄账户 1 : 信用账户 Account acc = bank.registAccount("tom" + i, "abc123", "2729382932", 183923302L, "tom" + i + "@163.com", i % 2, (i % 2 == 0) ? 0 : 3000); if (i % 2 != 0) { CreditAccount creditAcc = (CreditAccount) acc; System.out.println("所有信用账户的名字:" + creditAcc.getAccountName() + "和透支额度:" + creditAcc.getMaxOverdraw()); } } // 1000个银行账户开户,500是信用账户,最高透支额度随机数赋值,再测试 // double sum = bank.统计所有信用账户的最高透支额度的总和 (); double sum = bank.statisticsCreditAccountMaxoverdrawSum(); System.out.println("所有信用账户的最高透支额度的总和 :" + sum); double sum1 = bank.aggregateAamount(); System.out.println("总余额为" + sum1); } }
测试类的内容不多写,大家有兴趣可以自行测试。这样,我们就完成了一个比较简单的ATM项目。希望对新学者有所帮助。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持易盾网络。