语法错误，文件读取器问题，setter问题。复杂的问题

Question

我会发布下面的完整代码。在我上一篇文章后，我试图让它成为自动格式。我希望不要太难阅读。无论如何...的问题....

我有三个问题。

第一）线113

的BufferedReader withdrawalFile = Files.newBufferedReader（取款，Charset.defaultCharset（））;

有一个错误“令牌上的语法错误”;“，{在此令牌之后预期。”

我完全不理解这个错误。如果你看94行，你会看到我写了“存款”的相同代码行，这没有同样的问题。

第二）线119

userAccount.setWithdrawal（userWithdrawal）;

有一个错误要求我为userAccount创建一个局部变量。我认为这是连接到上面的错误，但我试过寻找一个花括号或什么的。我找不到任何东西。

3）与我的二传手的错误？

账户金额应该是610.17美元。它以500.00结尾文件阅读器应该编辑帐户中的金额上涨$ 110.17，但它不是，我不知道为什么。

此外，任何关于如何使我的代码更清洁的建议是值得欢迎的。

import java.io.BufferedReader; 
import java.io.IOException; 
import java.nio.charset.Charset; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
import javax.swing.JOptionPane; 


public class Savings { 
    private double accountAmount; 
    private double interestRate; 
    private int months; 

//Provides access to interestRate, accountAmount, and months with getters 
// and setters 
public void setBeginning(double testAccount){ 
    this.accountAmount= testAccount;} 

public void setAccountAmount(double userInput){ 
    this.accountAmount = userInput; 
} 

public void setWithdrawal(double withdrawal){ 
    this.accountAmount = (accountAmount- withdrawal) ;} 

public void setDeposit(double deposit){ 
    this.accountAmount = (accountAmount + deposit);} 

public void setMonths(int userMonths){ 
    this.months = userMonths;} 

public void setInterest(double userInterest){ 
    this.interestRate= userInterest;} 

public int getMonths(){ 
    return this.months;} 

public double getInterest(){ 
    return this.interestRate;} 

public double getAccount(){ 
    return this.accountAmount;  } 


// Main method. Creates a savings account (userAccount) gets an interest rate and # of months 
//from the user. 
// Reads pre-written deposit and withdrawal files, account should end up at $610.17 

public static void main (String [] args)throws IOException{ 
    String stringInterest, stringMonths; 
    int userMonths; 
    double userInterest, preInterestAccount; 

    Savings userAccount = new Savings(); 

    stringInterest = JOptionPane.showInputDialog("What is the monthly interest rate " 
     + "on your account?\n Put it in decimal terms.\n (Ex: 1.0 would be 100%)"); 

if (stringInterest == null) { 
    System.exit(0); } 
    while (stringInterest.trim().length()== 0 || Double.parseDouble(stringInterest) < 0){ 
     stringInterest= JOptionPane.showInputDialog("You did not enter a valid value.\n" + 
     "Please enter a valid value for interest."); 
     if (stringInterest == null){ 
      System.exit(0);} 
    }//ends the while 

stringMonths = JOptionPane.showInputDialog("How many months will the money be " 
     + "in your account?"); 
if (stringMonths == null) { 
    System.exit(0); } 
while (stringMonths.trim().length()== 0 || Integer.parseInt(stringMonths) < 0){ 
    stringInterest= JOptionPane.showInputDialog("You did not enter a valid value.\n" + 
     "Please enter a valid value for interest."); 
    if (stringInterest == null){ 
     System.exit(0);} 
}//ends the while 

userMonths=Integer.parseInt(stringMonths); 
userInterest=Double.parseDouble(stringInterest); 

userAccount.setMonths(userMonths); 
userAccount.setInterest(userInterest);; 
userAccount.setBeginning(500.00); 

Path Deposists = Paths.get("C:\\Users\\Owner\\workspace\\BankAccount\\" 
     + "src\\Deposists.txt"); 


BufferedReader depositFile = Files.newBufferedReader(Deposists, Charset.defaultCharset()); 
String dLine; 

// read each line 
     while((dLine = depositFile.readLine()) != null) { 
      double userDeposit; 

      userDeposit=Double.parseDouble(dLine); 
      userAccount.setDeposit(userDeposit); 
      } 
     depositFile.close();} 



Path Withdrawals = Paths.get("C:\\Users\\Owner\\workspace\\BankAccount\\" 
       + "src\\Withdrawals.txt"); 

String wLine; 

BufferedReader withdrawalFile = Files.newBufferedReader(Withdrawals, Charset.defaultCharset()); 

    while((wLine = withdrawalFile.readLine()) != null) { 
        double userWithdrawal; 

        userWithdrawal=Double.parseDouble(wLine); 
        userAccount.setWithdrawal(userWithdrawal); 
        } 
       withdrawalFile.close(); 


     preInterestAccount = userAccount.getAccount(); 
     userAccount.setAccountAmount((userAccount.getAccount()*(1+userAccount.getInterest())* 
     (userAccount.getMonths()))); 

JOptionPane.showMessageDialog(null, "The interest rate is "+ (userAccount.getInterest()*100) 
     +"%.\n"+ "Your money was in the account for " + userAccount.getMonths()+" months.\n" 
     + "The balance on your account before interest is "+ preInterestAccount + ".\n" 
     + "The final balance of your account is "+ (userAccount.getAccount()) +"."); 

    }//ends main method 

}

Answer 1

你必须在下面的while循环两个闭合支架。这会导致第113行和第119行出现错误。请在depositFile.close();之后删除括号。

// read each line 
    while((dLine = depositFile.readLine()) != null) { 
     double userDeposit; 

     userDeposit=Double.parseDouble(dLine); 
     userAccount.setDeposit(userDeposit); 
     } // <--------------- HERE -------------------- 
    depositFile.close();} // <------------ AND HERE --- 

此外，你有一个不必要的分号，这不会导致错误，但它不应该存在：

userAccount.setMonths(userMonths); 
userAccount.setInterest(userInterest);; //<-------- HERE 
userAccount.setBeginning(500.00); 

为了使您的代码更加清晰：如果您使用的是IDE，像Eclipse一样，那么应该有一个选项来自动格式化你的代码。在Eclipse中它是Source->format。