Java-TreeMap用户输入

我正在创建一个银行系统项目

我在将用户输入/扫描仪与treemap合并时遇到问题

我想创建一个帐号为帐号的帐号，帐号为帐号的帐号名为密钥

当帐户被存储后，我将为事务创建一个链表，该链表只存储最后6个事务

有人能给我一些关于如何从用户输入添加帐户到树形图的指导吗 命令盒

多谢各位

import java.util.*;
public class Bank {
  TreeMap < Integer, BankAccount > accounts = new TreeMap < Integer, BankAccount > ();



  public int openNewAccount(int accountNumber, String holderName, double openingBalance, String holderAddress, String openDate) {

    }
    //End of Class
}

import java.util.*；
公营银行{
TreeMapaccounts=新的TreeMap（）；
public int-openNewAccount（int-accountNumber，String-holderName，double-openingBalance，String-holderAddress，String-openDate）{
}
//下课
}

import java.util.*；
公营银行帐户{
私人国际帐户号码；
私有字符串持有者名称；
私有字符串持有者地址；
私有字符串openDate；
私人双电流平衡；
私有列表latestTransactions=newarraylist（）；
公共银行账户（int accountNum、String holderNam、String holderAdd、，
字符串（openDat）{
accountNumber=accountNum；
holderName=holderNam；
holderAddress=holderAdd；
openDate=openDat；
}
公共字符串getAccountInfo（）{
返回“\n账号：“+accountNumber+”\n股东姓名：“+holderName+”\n股东地址：“+holderAddress+”\n开放日期：“+openDate+”\n当前余额：“+currentBalance；
}
public int getAccountNum（）{
返回帐号；
}
//下课
}

import java.util.*；
公共类事务{
私有列表transactions=newarraylist（）；
公开交易（国际账户号，双倍当前余额）{
}
公共无效添加事务（事务t）{
if（transactions.size（）+1>6）
transactions.remove（0）；//首先删除列表元素
增加（t）；
}
公共无效存款（双倍活期余额，双倍金额）{
如果（数量我希望这将有助于你了解该怎么做

注意：我在里面提供了一些评论，以便您理解。如果对此仍不清楚，请发表评论

银行类

public class BankAccount {

    private int accountId;
    private String holderName;
    private String holderAddress;
    private String openDate;
    private double currentBalance;

    private List<Transaction> transactions = new ArrayList<Transaction>();

    //Provide Blank Constructor
    public BankAccount(){}

    //Constructor with an arguments.
    public BankAccount(int accountNum, String holderNam,double currentBalance, String holderAdd,String openDate) {
            this.accountId = accountNum;
            this.holderName = holderNam;
            this.holderAddress = holderAdd;
            this.openDate = openDate;
            this.currentBalance = currentBalance;
    }

    // Always Provide Setter and Getters
    public int getAccountId() {
        return accountId;
    }
    public void setAccountId(int accountId) {
        this.accountId = accountId;
    }
    public String getHolderName() {
        return holderName;
    }
    public void setHolderName(String holderName) {
        this.holderName = holderName;
    }
    public String getHolderAddress() {
        return holderAddress;
    }
    public void setHolderAddress(String holderAddress) {
        this.holderAddress = holderAddress;
    }
    public String getOpenDate() {
        return openDate;
    }
    public void setOpenDate(String openDate) {
        this.openDate = openDate;
    }
    public double getCurrentBalance() {
        return currentBalance;
    }
    public void setCurrentBalance(double currentBalance) {
        this.currentBalance = currentBalance;
    }

    public List<Transaction> getTransactions() {
        return transactions;
    }

    public void setTransactions(List<Transaction> transactions) {
        this.transactions = transactions;
    }

    public String toString(){
        return "\nAccount number: " + accountId + "\nHolder's name: " + holderName + "\nHolder's address: " + holderAddress + "\nOpen Date: " + openDate + "\nCurrent balance: " + currentBalance;
    }

}

public class Transaction {

    private int transactionId;
    private String transactionType;
    private double transactionAmount;
    private double moneyBeforeTransaction;
    private double moneyAfterTransaction;

    public Transaction(){}

    public Transaction(int transactionId,String transactionType,double transactionAmount, double moneyBeforeTransaction){
        this.transactionId = transactionId;
        this.transactionType = transactionType;
        this.transactionAmount = transactionAmount;
        this.moneyBeforeTransaction = moneyBeforeTransaction;
    }

    public int getTransactionId() {
        return transactionId;
    }

    public void setTransactionId(int transactionId) {
        this.transactionId = transactionId;
    }

    public String getTransactionType() {
        return transactionType;
    }

    public void setTransactionType(String transactionType) {
        this.transactionType = transactionType;
    }

    public double getTransactionAmount() {
        return transactionAmount;
    }

    public void setTransactionAmount(double transactionAmount) {
        this.transactionAmount = transactionAmount;
    }

    public double getMoneyBeforeTransaction() {
        return moneyBeforeTransaction;
    }

    public void setMoneyBeforeTransaction(double moneyBeforeTransaction) {
        this.moneyBeforeTransaction = moneyBeforeTransaction;
    }

    public double getMoneyAfterTransaction() {
        return moneyAfterTransaction;
    }

    public void setMoneyAfterTransaction(double moneyAfterTransaction) {
        this.moneyAfterTransaction = moneyAfterTransaction;
    }

    //Override the toString() method of String ? 
    public String toString(){
        return "Transaction ID : " + this.transactionId +
                " Transaction Type : " + this.transactionType +
                " Transaction Amount : " + this.transactionAmount +
                " Money Before Transaction : " + this.moneyBeforeTransaction + 
                " Money After Transaction : " + this.moneyAfterTransaction;
    }

}

public class TransactionProcess {

    //Always Provide another class for process.
    //Pass the bankAccount of the user
    public void deposit(BankAccount bankAccount, double depositAmount) {
        //Get the CurrentBalance
        double currentBalance = bankAccount.getCurrentBalance();

        //First Argument : set the Id of transaction
        //Second Argument : set the Type of Transaction
        //Third Argument : set the TransactionAmount 
        //Fourth Argument : set the Balance Before the transaction (for record purposes)
        Transaction transaction = new Transaction(bankAccount.getTransactions().size(),"Deposit",depositAmount,currentBalance);

        if (depositAmount <= 0) {
            System.out.println("Amount to be deposited should be positive");
        } else {
            //Set the updated or transacted balance of bankAccount.
            bankAccount.setCurrentBalance(currentBalance + depositAmount);
            //then set the MoneyAfterTransaction
            transaction.setMoneyAfterTransaction(bankAccount.getCurrentBalance());
            //after the transaction add it to the list of Transaction of bankAccount
            bankAccount.getTransactions().add(transaction);
        }

    }

    // Explanation same as above
    public void withdraw(BankAccount bankAccount,double withdrawAmount) {
        double currentBalance = bankAccount.getCurrentBalance();
        Transaction transaction = new Transaction(bankAccount.getTransactions().size(),"Withdraw",withdrawAmount,currentBalance);

        if (withdrawAmount <= 0) {
            System.out.println("Amount to be withdrawn should be positive");
        } else {
            if (currentBalance < withdrawAmount) {
                System.out.println("Insufficient balance");
            } else {
                bankAccount.setCurrentBalance(currentBalance - withdrawAmount);
                transaction.setMoneyAfterTransaction(bankAccount.getCurrentBalance());
                bankAccount.getTransactions().add(transaction);
            }
        }

    }

}

public class BankProcess {

    // return the  Updated list of BankAccounts
    public TreeMap<Integer,BankAccount> openNewAccount(TreeMap<Integer,BankAccount> bankAccounts,BankAccount bankAccount) {
        //Get the List of existing bank Accounts the add the new BankAccount to it.
        bankAccounts.put(bankAccount.getAccountId(), bankAccount);
        return bankAccounts;
    }

}

为Pojo（普通旧Java对象）提供Setter和Getter

始终将您的事务流程或POJO内的任何其他流程分开

看这个

交易流程类

public class BankAccount {

    private int accountId;
    private String holderName;
    private String holderAddress;
    private String openDate;
    private double currentBalance;

    private List<Transaction> transactions = new ArrayList<Transaction>();

    //Provide Blank Constructor
    public BankAccount(){}

    //Constructor with an arguments.
    public BankAccount(int accountNum, String holderNam,double currentBalance, String holderAdd,String openDate) {
            this.accountId = accountNum;
            this.holderName = holderNam;
            this.holderAddress = holderAdd;
            this.openDate = openDate;
            this.currentBalance = currentBalance;
    }

    // Always Provide Setter and Getters
    public int getAccountId() {
        return accountId;
    }
    public void setAccountId(int accountId) {
        this.accountId = accountId;
    }
    public String getHolderName() {
        return holderName;
    }
    public void setHolderName(String holderName) {
        this.holderName = holderName;
    }
    public String getHolderAddress() {
        return holderAddress;
    }
    public void setHolderAddress(String holderAddress) {
        this.holderAddress = holderAddress;
    }
    public String getOpenDate() {
        return openDate;
    }
    public void setOpenDate(String openDate) {
        this.openDate = openDate;
    }
    public double getCurrentBalance() {
        return currentBalance;
    }
    public void setCurrentBalance(double currentBalance) {
        this.currentBalance = currentBalance;
    }

    public List<Transaction> getTransactions() {
        return transactions;
    }

    public void setTransactions(List<Transaction> transactions) {
        this.transactions = transactions;
    }

    public String toString(){
        return "\nAccount number: " + accountId + "\nHolder's name: " + holderName + "\nHolder's address: " + holderAddress + "\nOpen Date: " + openDate + "\nCurrent balance: " + currentBalance;
    }

}

public class Transaction {

    private int transactionId;
    private String transactionType;
    private double transactionAmount;
    private double moneyBeforeTransaction;
    private double moneyAfterTransaction;

    public Transaction(){}

    public Transaction(int transactionId,String transactionType,double transactionAmount, double moneyBeforeTransaction){
        this.transactionId = transactionId;
        this.transactionType = transactionType;
        this.transactionAmount = transactionAmount;
        this.moneyBeforeTransaction = moneyBeforeTransaction;
    }

    public int getTransactionId() {
        return transactionId;
    }

    public void setTransactionId(int transactionId) {
        this.transactionId = transactionId;
    }

    public String getTransactionType() {
        return transactionType;
    }

    public void setTransactionType(String transactionType) {
        this.transactionType = transactionType;
    }

    public double getTransactionAmount() {
        return transactionAmount;
    }

    public void setTransactionAmount(double transactionAmount) {
        this.transactionAmount = transactionAmount;
    }

    public double getMoneyBeforeTransaction() {
        return moneyBeforeTransaction;
    }

    public void setMoneyBeforeTransaction(double moneyBeforeTransaction) {
        this.moneyBeforeTransaction = moneyBeforeTransaction;
    }

    public double getMoneyAfterTransaction() {
        return moneyAfterTransaction;
    }

    public void setMoneyAfterTransaction(double moneyAfterTransaction) {
        this.moneyAfterTransaction = moneyAfterTransaction;
    }

    //Override the toString() method of String ? 
    public String toString(){
        return "Transaction ID : " + this.transactionId +
                " Transaction Type : " + this.transactionType +
                " Transaction Amount : " + this.transactionAmount +
                " Money Before Transaction : " + this.moneyBeforeTransaction + 
                " Money After Transaction : " + this.moneyAfterTransaction;
    }

}

public class TransactionProcess {

    //Always Provide another class for process.
    //Pass the bankAccount of the user
    public void deposit(BankAccount bankAccount, double depositAmount) {
        //Get the CurrentBalance
        double currentBalance = bankAccount.getCurrentBalance();

        //First Argument : set the Id of transaction
        //Second Argument : set the Type of Transaction
        //Third Argument : set the TransactionAmount 
        //Fourth Argument : set the Balance Before the transaction (for record purposes)
        Transaction transaction = new Transaction(bankAccount.getTransactions().size(),"Deposit",depositAmount,currentBalance);

        if (depositAmount <= 0) {
            System.out.println("Amount to be deposited should be positive");
        } else {
            //Set the updated or transacted balance of bankAccount.
            bankAccount.setCurrentBalance(currentBalance + depositAmount);
            //then set the MoneyAfterTransaction
            transaction.setMoneyAfterTransaction(bankAccount.getCurrentBalance());
            //after the transaction add it to the list of Transaction of bankAccount
            bankAccount.getTransactions().add(transaction);
        }

    }

    // Explanation same as above
    public void withdraw(BankAccount bankAccount,double withdrawAmount) {
        double currentBalance = bankAccount.getCurrentBalance();
        Transaction transaction = new Transaction(bankAccount.getTransactions().size(),"Withdraw",withdrawAmount,currentBalance);

        if (withdrawAmount <= 0) {
            System.out.println("Amount to be withdrawn should be positive");
        } else {
            if (currentBalance < withdrawAmount) {
                System.out.println("Insufficient balance");
            } else {
                bankAccount.setCurrentBalance(currentBalance - withdrawAmount);
                transaction.setMoneyAfterTransaction(bankAccount.getCurrentBalance());
                bankAccount.getTransactions().add(transaction);
            }
        }

    }

}

public class BankProcess {

    // return the  Updated list of BankAccounts
    public TreeMap<Integer,BankAccount> openNewAccount(TreeMap<Integer,BankAccount> bankAccounts,BankAccount bankAccount) {
        //Get the List of existing bank Accounts the add the new BankAccount to it.
        bankAccounts.put(bankAccount.getAccountId(), bankAccount);
        return bankAccounts;
    }

}

都德..你至少要给我们看一些代码。谷歌搜索扫描器和树形图。你会得到很多教程。你甚至是如何创建
银行帐户的？
？你在任何地方都没有实例化一个。@Makoto你是什么意思？我的意思是，你在这里有很多结构和定义，但我看不到你的对象彼此交互。你没有创建一个新的
银行账户
。这可能是你被卡住的地方，所以让我换一句话：在你的
银行
类中，你实际希望从
openNewAccount
方法中得到什么？非常感谢！问题。如果我只想要一个银行账户，我将如何进行？例如，当程序运行时，我会t已经在一家银行中启动，用户所做的只是通过添加帐户等方式与该银行进行交互…可以对银行类做什么？ahmm你的意思是你想要获得特定的银行帐户？如果是，只需调用
bank.getBankAccounts（）.get（accountId）；
我只希望用户与银行帐户交互，而不是创建一个id和名称为的新银行。应该创建一个银行帐户，该帐户应保存到代码中已提供的银行中。aaaa。您想拥有一个现有银行吗？查看我的更新：）顺便说一句。从什么时候开始使用这种语言？
Bank Id: 1
Bank Name: SampleBank
Account Id: 1
Holder Name: SampleName
Opening Balance: 10000
Holder Address: SampleAddress
Open Date: SampleDate
Enter Deposit Amount
1000
Enter Withdraw Amount
2000

Account number: 1
Holder's name: SampleName
Holder's address: SampleAddress
Open Date: SampleDate
Current balance: 9000.0
Transaction ID : 0 Transaction Type : Deposit Transaction Amount : 1000.0 Money Before Transaction : 10000.0 Money After Transaction : 11000.0
Transaction ID : 1 Transaction Type : Withdraw Transaction Amount : 2000.0 Money Before Transaction : 11000.0 Money After Transaction : 9000.0