用Java寫一個(gè)記賬系統(tǒng)項(xiàng)目的代碼

用Java寫一個(gè)記賬系統(tǒng)項(xiàng)目的代碼```Java

//AccountManagementSystem

publicclassAccountManagementSystem{

publicstaticvoidmain(String[]args){

//Initializeaccountinformationdatastructure

Map<String,List<AccountOperation>>accounts=newHashMap<>();

//Starttheaccountmanagementsystem

while(true){

//Readuserinput

Stringcommand=readUserInput();

if(command.equals("exit")){

break;

}

//Executecommand

if(command.startsWith("add")){

String[]parts=command.split("");

StringaccName=parts[1];

floatamount=Float.valueOf(parts[2]);

//Addtheaccounttothemap

addAccount(accName,amount,accounts);

}elseif(command.startsWith("list")){

//Listalltheaccounts

listAccounts(accounts);

}elseif(command.startsWith("deposit")){

String[]parts=command.split("");

StringaccName=parts[1];

floatamount=Float.valueOf(parts[2]);

//Addmoneytotheaccount

deposit(accName,amount,accounts);

}elseif(command.startsWith("withdraw")){

String[]parts=command.split("");

StringaccName=parts[1];

floatamount=Float.valueOf(parts[2]);

//withdrawmoneyfromtheaccount

withdraw(accName,amount,accounts);

}

}

}

privatestaticvoidwithdraw(StringaccName,floatamount,Map<String,List<AccountOperation>>accounts){

//Getaccountandupdatebalance

AccountOperationaccountOperation=accounts.get(accName).get(accounts.get(accName).size()-1);

accountOperation.setBalance(accountOperation.getBalance()-amount);

//Printouttheupdatedbalance

System.out.println("Withdrew"+amount+"fromaccount:"+accName+".Updatedbalanceis"+accountOperation.getBalance());

}

privatestaticvoiddeposit(StringaccName,floatamount,Map<String,List<AccountOperation>>accounts){

//Getaccountandupdatebalance

AccountOperationaccountOperation=accounts.get(accName).get(accounts.get(accName).size()-1);

accountOperation.setBalance(accountOperation.getBalance()+amount);

//Printouttheupdatedbalance

System.out.println("Deposited"+amount+"toaccount:"+accName+".Updatedbalanceis"+accountOperation.getBalance());

}

privatestaticvoidlistAccounts(Map<String,List<AccountOperation>>accounts){

//Iteratethroughaccounts

for(StringaccName:accounts.keySet()){

//Getlastaccountoperationoftheaccount

AccountOperationaccountOperation=accounts.get(accName).get(accounts.get(accName).size()-1);

//Printoutaccountnameandbalance

System.out.println("Account:"+accName+".Balance:"+accountOperation.getBalance());

}

}

privatestaticvoidaddAccount(StringaccName,floatamount,Map<String,List<AccountOperation>>accounts){

//Createnewaccountobject

AccountOperationaccountOperation=newAccountOperation(accName,amount);

//Addaccountobjecttoaccountslist

if(accounts.containsKey(accName)){

accounts.get(accName).add(accountOperation);

}else{

List<AccountOperation>list=newArrayList<>();

list.add(accountOperation);

accounts.put(accName,list);

}

//Printoutsuccessmessage

System.out.println("Addednewaccount"+accName+",initialbalanceis"+amount);

}

privatestaticStringreadUserInput(){

//Readuserinput

Scannerscanner=newScanner(System.in);

System.out.print("Enteracommand(add,list,deposit,withdraw,exit):");

returnscanner.nextLine();

}

}

classAccountOperation{

privateStringaccountName;

privatefloatbalance;

publicAccountOperation(StringaccountName,floatbalance){

this.accountName=accountName;

this.balance=balance;

}

publicStringgetAccountName(){

returnaccountName;

}

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