如何在儲蓄賬戶程序中添加總計所有月份餘額的代碼

我在Java中的程序有效，但我不確定如何獲得這兩個賬戶的總餘額。現在我只是打印出#####。如何在儲蓄賬戶程序中添加總計所有月份餘額的代碼

這應該是輸出：

兩個帳戶相結合的餘款：5255.81

我不想只需鍵入答案。我們必須展示程序添加兩個帳戶的所有餘額，但我不知道如何編寫該代碼。

這裏是我的司機：

public class LineberryRaeChapter13Prog { 
public static void main(String args[]) 
{ 
    LRSavingsAccount saver1 = new LRSavingsAccount(2000); 
    LRSavingsAccount saver2 = new LRSavingsAccount(3000); 
    LRSavingsAccount.newInterestRate(0.05); 

    System.out.println("\nMonthly balances for one year with 0.05 annual interest:\n"); 
    System.out.printf("%10s%10s%10s%10s%10s\n", "Month", "Account#", "Balance", "Account#", "Balance"); 
    System.out.printf("%10s%10s%10s%10s%10s\n", "-----", "--------", "-------", "--------", "-------"); 
    System.out.printf("%10s%10s%10s%10s%10s\n", "0","10002", saver1.toString(), "10003", saver2.toString()); 

    for (int month = 1; month <= 12; month++) 
    { 
    switch (month) 
    { 
    case 1:System.out.printf("\n"); 
    break; 
    case 2:System.out.printf("\n"); 
    break; 
    case 3:System.out.printf("\n"); 
    break; 
    case 4:System.out.printf("\n"); 
    break; 
    case 5:System.out.printf("\n"); 
    break; 
    case 6:System.out.printf("\n"); 
    break; 
    case 7:System.out.printf("\n"); 
    break; 
    case 8:System.out.printf("\n"); 
    break; 
    case 9:System.out.printf("\n"); 
    break; 
    case 10:System.out.printf("\n"); 
    break; 
    case 11:System.out.printf("\n"); 
    break; 
    case 12:System.out.printf("\n"); 
    break; 
    }//end switch 

String monthLabel = String.format("%d", month); 
saver1.addMonthlyInterest(); 
saver2.addMonthlyInterest(); 

System.out.printf("%10s%10s%10s%10s%10s\n", monthLabel, "10002", saver1.toString(), "10003", saver2.toString()); 
}//end for 

System.out.printf("%10s%10s\n", "\nFinal balance of both accounts combined:", "######"); 
}//end main 
}//end LineberryRaeChapter13Prog

這裏是類：

public class LRSavingsAccount 
{ 
    // interest rate for all accounts 

private static double annualInterestRate = 0; 
private double Balance; 
public static void newInterestRate(double newRate) 
{ 
annualInterestRate = (newRate >= 0 && newRate <= 1.0) ? newRate : 0.05; 
}//end newInterestRate 

// provides account balances 

public LRSavingsAccount(double balance) 
{ 
Balance = balance; 
}//end Constructor 

// calculates the interest for each month 

public void addMonthlyInterest() 
{ 
Balance += Balance * (annualInterestRate/12.0); 
}//end addMonthlyInterest 

// get string representation of SavingAccount 

public String toString() 
{ 
return String.format("$%.2f", Balance); 
}//end accesssor 

}//end SavingsAccount

來源

2015-09-11 rlineberry

爲LRSavingsAccount添加代碼。或者你可以使用Double.parseDouble（saver1.toString（））+ Double.parseDouble（saver2.toString（）） – StackFlowed

你還可以提供'LRSavingsAccount'的實現嗎？我認爲這會像'saver1.getBalance（）+ saver2.getBalance（）'一樣簡單，但我不知道是否有這樣的方法。 –

你必須編輯你的帖子並把類LRSavingsAccount。另外，你有什麼交易？ –

我看到它，你可以在LRSavingsAccount添加getter的餘額字段的方式。所以

public double getBalance() { return Balance; }

而在最後，你可以只是做

System.out.println(Final balance of both accounts combined:" + (saver1.getBalance() + saver2.getBalance());

除非我失去了一些東西。

來源

2015-09-11 21:43:35 Austin

謝謝奧斯汀。我做了上面的system.out.println，當然這不起作用，因爲我忘記了將它添加到我的課程代碼中的步驟。再次感謝。 – rlineberry

如何在儲蓄賬戶程序中添加總計所有月份餘額的代碼

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