ここで私が間違っていることを誰かに教えてもらえますか。ユーザー入力からいくつかの JOptionPane-input-dialog-boxes へのいくつかの値を計算し、回答を出力する必要があります。
助けていただければ幸いです。前もって感謝します！
- 入力
- 比較するローンの数 (1 つ以上の可能性があります)
- 販売価格
- 頭金
- 比較したい各ローンについて、次の質問をします。
- 金利
- 年数
- 処理
- 与えられた金利と年数について、パート d にリストされている各シナリオの月々の支払いを計算する必要があります。
- 出力
- 販売価格
- 頭金
- ローン金額
- シナリオ別一覧
- 興味
- 年
- 支払い
これまでの私のコードは次のとおりです。
package javamortgagecalculator;
import javax.swing.JOptionPane;
import java.util.*;
public class JavaMortgageCalculator {
public static void main(String[] args) {
//A. Enter the Number Of Loans to compare
String numberOfLoansString = JOptionPane.showInputDialog("Enter the Number Of Loans to Compare");
//Convert numberOfLoansString to int
int numberOfLoans = Integer.parseInt(numberOfLoansString);
//B. Enter the Selling Price of Home
String sellingPriceString = JOptionPane.showInputDialog("Enter the Loan Amount");
//Convert homeCostString to double
double sellingPrice = Double.parseDouble(sellingPriceString);
//C. Enter the Down Payment on the Home
String downPaymentString = JOptionPane.showInputDialog("Enter the down payment on the Home");
double downPayment = Double.parseDouble(downPaymentString);
//Get the loanAmount by Subtracting the Down Payment from homeCost
double loanAmount = sellingPrice - downPayment;
//D. Ask the following for as many number of loans they wish to compare
//D1 Get the interest rate
double[] annualInterestRatesArray = new double[numberOfLoans];
double[] monthlyInterestRateArray = new double[numberOfLoans];
int[] numberOfYearsArray = new int[numberOfLoans];
double[] monthlyPaymentArray = new double[numberOfLoans];
double[] totalPaymentArray = new double[numberOfLoans];
int counter = 1;
for (int i=0; i < numberOfLoans; i++)
{
String annualInterestRateString = JOptionPane.showInputDialog("Enter the interest rate for Scenario " + counter);
double annualInterestRate = Double.parseDouble(annualInterestRateString);
annualInterestRatesArray[i] = (annualInterestRate);
//Obtain monthly interest rate
double monthlyInterestRate = annualInterestRate / 1200;
monthlyInterestRateArray[i] = (monthlyInterestRate);
//D2 Get the number of years
String numberOfYearsString = JOptionPane.showInputDialog("Enter the number of years for Scenario " + counter);
int numberOfYears = Integer.parseInt(numberOfYearsString);
numberOfYearsArray[i] = (numberOfYears);
//Calculate monthly payment
double monthlyPayment = loanAmount * monthlyInterestRate / (1 - 1 / Math.pow(1 + monthlyInterestRate, numberOfYears * 12));
//Format to keep monthlyPayment two digits after the decimal point
monthlyPayment = (int)(monthlyPayment * 100) / 100.0;
//Store monthlyPayment values in an array
monthlyPaymentArray[i] = (monthlyPayment);
//Calculate total Payment
double totalPayment = monthlyPaymentArray[i] * numberOfYears * 12;
//Format to keep totalPayment two digits after the decimal point
totalPayment = (int)(totalPayment * 100) / 100.0;
totalPaymentArray[i] = (totalPayment);
counter++;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < numberOfLoans; i++) {
sb.append(String.format("\t \t \t \t \t \n", sellingPrice, downPayment, loanAmount, Arrays.toString(annualInterestRatesArray), Arrays.toString(numberOfYearsArray), Arrays.toString(monthlyPaymentArray)));
}
String toDisplay=sb.toString();
JOptionPane.showMessageDialog(null, sb.toString(), toDisplay, JOptionPane.INFORMATION_MESSAGE);
}
}