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java账户转钱代码 java用户转账
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如何用Java代码编写银行转账
public interface ITransfer{ /* * 银行内部转账,从转出账号中扣除转账金额,给转入账号增加转账金额,需要保证以上两个操作 * 要么同时成功,要么同时失败 * fromAccountId 转出账号 * outAccountId 转入账号 * amount 转账金额 */ public void transferInner(String fromAccountId,String outAccountId,BigDecimal amount); /* * 外部转账-转出,从转出账号中扣除转账金额 * fromAccoutnId 转出账号 * amount 转账金额 */ public void transferOut(String fromAccountId,String outAccountId,BigDecimal amount); /* * 外部转账-转入,从转入账号中增加转账金额 * toAccoutnId 转出账号 * amount 转账金额 */ public void transerIn(String toAccountId,BigDecimal amount); } public interface ITransfer{ /* * 银行内部转账,从转出账号中扣除转账金额,给转入账号增加转账金额,需要保证以上两个操作 * 要么同时成功,要么同时失败 * fromAccountId 转出账号 * outAccountId 转入账号 * amount 转账金额 */ public void transferInner(String fromAccountId,String outAccountId,BigDecimal amount); /* * 外部转账-转出,从转出账号中扣除转账金额 * fromAccoutnId 转出账号 * amount 转账金额 */ public void transferOut(String fromAccountId,String outAccountId,BigDecimal amount); /* * 外部转账-转入,从转入账号中增加转账金额 * toAccoutnId 转出账号 * amount 转账金额 */ public void transerIn(String toAccountId,BigDecimal amount); }
相关问答
Q1: 实现A B两个用户之间的转账，我的代码不正确，求修正java语言
1. 首先为什么线程启动2次
a.start();
b.start();
2.其次System.out.println("请输入您的选择:A转账到B或者B转账到A");
这个输入的值你那里有取得
Q2: 用Java编写银行账户存取款业务，急求！！
public class Account {
protected String accId;
protected String name;
protected double money;
public Account (String accId,String name){
this(accId,name,0);
}
public Account (String accId,String name,double money){
this.accId = accId;
this.name = name;
this.money = money;
}
public void saveMoney(double money){
if(money = 0){
System.out.println("存款金额必须大于0");
}
this.money += money;
System.out.println("存款成功");
}
public double getMoney(double money){
if(money = 0){
System.out.println("取款金额必须大于0");
return 0;
}
if(this.money = money){
System.out.println("余额不足，无法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
public double getBalance(){
return this.money;
}
protected double getOverdraft(){
return 0;
}
// 实现了equals方法，list比较时才能正确
@Override
public boolean equals(Object obj) {
if(obj == null){
return false;
}
if(this == obj){
return true;
}
if(obj instanceof Account){
return this.accId.equals(((Account)obj).accId);
}
return false;
}
@Override
public String toString() {
return "账户=" + accId + ",名字=" + name + ",余额=" + money;
}
}
public class Bank {
// Account实现了equals方法，list查找时才能正确
private ListAccount usersAccounts;
public Bank() {
usersAccounts = new ArrayListAccount();
}
public void addAccount(Account account) {
if (usersAccounts.contains(account)) {
System.out.println("添加失败，不能添加同样的账户");
return;
}
usersAccounts.add(account);
}
public boolean delAccount(Account account) {
return usersAccounts.remove(account);
}
public boolean delAccount(String accId) {
return delAccount(new Account(accId, null));
}
public boolean existAccount(Account account) {
return usersAccounts.contains(account);
}
public boolean existAccount(String accId) {
return existAccount(new Account(accId, null));
}
public Account getAccount(String accId){
return usersAccounts.get(usersAccounts.indexOf(new Account(accId, null)));
}
public double getAllMoney() {
// 不考虑是否溢出，只是把所有用户余额相加
double result = 0;
for (Account account : usersAccounts) {
result += account.getBalance();
}
return result;
}
public double getAllOverdraft() {
// 不考虑是否溢出
double result = 0;
for (Account account : usersAccounts) {
result += account.getOverdraft();
}
return result;
}
public int getAccountNum() {
return usersAccounts.size();
}
public int getCreditAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
// instanceof 性能没有简单的方法快。
if (account instanceof CreditAccount) {
num++;
}
}
return num;
}
public int getSavingAccountNum() {
int num = 0;
for (Account account : usersAccounts) {
if (account instanceof SavingAccount) {
num++;
}
}
return num;
}
public ListAccount getAllAccount() {
return usersAccounts;
}
}
public class CreditAccount extends Account{
private double overdraft;
public CreditAccount(String accId,String name){
super(accId, name);
this.overdraft = 1000;
}
public CreditAccount(String accId,String name,double money){
this(accId, name,money,1000);
}
public CreditAccount(String accId,String name,double money,double overdraft){
super(accId, name,money);
this.overdraft = overdraft;
}
@Override
public double getMoney(double money) {
if(money = 0){
System.out.println("取款金额必须大于0");
return 0;
}
if(this.money + overdraft = money){
System.out.println("余额不足，无法取款");
return 0;
}
this.money -= money;
System.out.println("取款成功");
return money;
}
@Override
public double getOverdraft(){
return overdraft;
}
@Override
public String toString() {
return "账户=" + accId + ",名字=" + name + ",余额=" + money + ",透支=" + overdraft;
}
}
public class SavingAccount extends Account {
public SavingAccount(String accId, String name) {
super(accId, name);
}
public SavingAccount(String accId, String name, double money) {
super(accId, name, money);
}
@Override
public double getMoney(double money) {
return super.getMoney(money);
}
@Override
public double getOverdraft() {
return super.getOverdraft();
}
}
public class Test {
private static Bank bank = new Bank();
public static void main(String[] args) {
Test.genAccount();
// 开户
Account a1 = new CreditAccount("1", "1", 200, 2000);
Account a2 = new SavingAccount("2", "2", 300);
Account a3 = new SavingAccount("3", "3", 400);
Account a4 = new CreditAccount("4", "4", 500, 2000);
Account a5 = new CreditAccount("4", "5", 600, 2000); // 帐号4重
bank.addAccount(a1);
bank.addAccount(a2);
bank.addAccount(a3);
bank.addAccount(a4);
bank.addAccount(a5);
showNowAccount();
// 销户
bank.delAccount("1");
bank.delAccount("2");
showNowAccount();
// 存款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
acc.saveMoney(100);
}
showNowAccount();
// 取款
if(bank.existAccount("3")){
Account acc = bank.getAccount("3");
System.out.println("余额=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余额=" + acc.getBalance());
}
if(bank.existAccount("4")){
Account acc = bank.getAccount("4");
System.out.println("余额=" + acc.getBalance());
acc.getMoney(100);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(1000);
System.out.println("余额=" + acc.getBalance());
acc.getMoney(10000);
System.out.println("余额=" + acc.getBalance());
}
System.out.println(bank.getAccountNum());
System.out.println(bank.getAllMoney());
System.out.println(bank.getAllOverdraft());
System.out.println(bank.getCreditAccountNum());
System.out.println(bank.getSavingAccountNum());
}
public static void genAccount(){
String s = "1000 0000 0000 000";
Account a = null;
for(int i = 1; i 11; i ++){
if((i 2) == 0){
a = new CreditAccount(s + String.valueOf(i), "账户" + String.valueOf(i));
} else {
a = new SavingAccount(s + String.valueOf(i), "账户" + String.valueOf(i));
}
bank.addAccount(a);
}
}
public static void showNowAccount(){
for(Account account : bank.getAllAccount()){
System.out.println(account);
}
}
}
// 面向对象，看多写多了就会了，简单的随便写的，有错误先不用太纠结。
Q3: java问题，实现账户A和B之间的转账功能，哪里错误呢，求大神指教，我是小白。
//你好,你这个题目,有两天了,不太好回答,因为你这个题目有敏感字,对于你提问来说问题不大!
//对于回答者会无休止的审核,我想了一下,用馒头来模拟你的答案!其实是一样的!
//我重新写了,你看看.我注释的很详细,不懂可以继续追问!
//测试
public class TestThread {
public static void main(String[] args) {
Buns mt = new Buns();//馒头类!
new Thread(new Res(mt, 1 2),"张三").start();
new Thread(new Res(mt, 1 2),"------------------李四").start();
}
}
// 馒头类!
class Buns {
private int sum,count;// 馒头数量,两个!
private boolean flag;// 判断!
// 空参构造!
Buns() {
this(1000);
}
// 形参构造!
Buns(int sum) {
this.sum = sum;
this.count=sum;
}
// 进馒头!
synchronized void out(int n) {
while (flag)// 判断真就挂起!
try {
this.wait();
} catch (Exception e) {
}
try {Thread.sleep(100);} catch (Exception e) {}
System.out.println(Thread.currentThread().getName() + "付出馒头=" +n+"个;剩余:"+ (sum -= n));
flag = true;
this.notify();// 唤醒对方!
}
// 出馒头!
synchronized void add(int n) {
while (!flag)// 判断,假就挂起
try {
this.wait();
} catch (Exception e) {
}
try {Thread.sleep(100);} catch (Exception e) {}
System.out.println(Thread.currentThread().getName() + "进入馒头="+n+"个;剩余:" + (count += n));
flag = false;
this.notify();// 唤醒对方!
}
// 查馒头!
int Sum() {
return sum;
}
// 查馒头!
int Count() {
return count;
}
}//线程Runnable接口子类!
class Res implements Runnable {
private boolean flag;//判断!
private Buns a;//馒头类!
Res(Buns a, boolean flag) {
this.a = a;
this.flag = flag;
}
public void run() {//重写!
if (flag)//如果真就+馒头!
add();
else
out();//假就-馒头!
}
private void add() {
while (a.Sum()100) //判断不会越界!
a.out(5);//每次-5个!
}
private void out() {
while (a.Count()1900)//判断不越界!
a.add(5);//每次+5个
}
}
Q4: 用Java实现ATM的转账，取款，改密码，查询功能， 要代码！
import javax.swing.JOptionPane;
public class Account
{
private String name;
private String account;
private String data;
private String ID;
private double balance;
public Account(String name,double balance,String data,String ID)
{
this.name = name;
this.balance = balance;
this.data=data;
this.ID=ID;
}
public String getaccount()
{
this.account=String.valueOf((int)(Math.random()*100000)+1);
return account;
}
public String getdata()
{
return data;
}
public String getID()
{
return ID;
}
public String getName()
{
return name;
}
public double getbalance()
{
return balance;
}
//查看账户余额
public double balance()
{
return balance;
}
//查看开户时间
public String data()
{
return data;
}
//存款操作
public boolean put(double value)
{
if (value0)
{
this.balance += value;
return true;
}
return false;
}
//取款操作
public double get(double value)
{
if (value0)
{
if (value=this.balance)
this.balance -= value;
else
{
value = this.balance;
this.balance = 0;
}
return value;
}
return 0;
}
public static void main(String args[]){
Account user=new Account("张三",2000,"2011/05/23","362329198906234225");
String str;
int b;
String s=JOptionPane.showInputDialog("您好，存款选择1，取款选择2，退出选择0");
int x=Integer.parseInt(s);
while(x!=0){
if(x==1)
{
str=JOptionPane.showInputDialog("输入您要存入java账户转钱代码的数额");
b=Integer.parseInt(str);
if( user.put(b)){
JOptionPane.showMessageDialog(null, "请放入钞票java账户转钱代码！");
JOptionPane.showMessageDialog(null,"开户账号为"+user.getaccount()+"\n"+user.getName()+"\n开户时间为"+user.data()+"\n您的余额为"+user.balance());
}
else
JOptionPane.showMessageDialog(null, "你所输入的存款数额有误java账户转钱代码！");
}
else{
str=JOptionPane.showInputDialog("输入您要取出的数额");
b=Integer.parseInt(str);
if(buser.balance())
{
JOptionPane.showMessageDialog(null, "余额不足");
}
else
{
JOptionPane.showMessageDialog(null, "请取出钞票java账户转钱代码！");
user.get(b);
JOptionPane.showMessageDialog(null,"开户账号为"+user.getaccount()+"\n"+user.getName()+"\n开户时间为"+user.data()+"\n您的余额为"+user.balance());
}
}
s=JOptionPane.showInputDialog("您好，存款选择1，取款选择2,退出选择0");
x=Integer.parseInt(s);
}
}
}
Q5: java需要写一个JAVA程序，模拟银行账户的查询、转账功能。
“\
T”选项卡，当输出数据显示，几乎以表格形式显示，目的是为了使数据看起来整齐点。
“\
n”换行，其他行显示下一个（...），目的是换行字符或字符串，使用System.out.println（）;效果是一样的。
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