我是这个论坛和Java的新手。我很难找到一种方法来要求用户输入多个贷款来比较D步骤。我需要能够向用户询问他们在步骤A中输入的金额的不同利率和年数。因此,如果他们输入10,那么我将不得不问他们10次利率和年数并输出它使用制表符的表格格式。任何帮助深表感谢。提前谢谢。
编辑:非常感谢你的帮助!我更新了代码。
//A. Enter the Number Of Loans to compare
String numberOfLoansString = JOptionPane.showInputDialog("Enter the amount of loans to compare:");
//Convert numberOfLoansString to int
int numberOfLoans = Integer.parseInt(numberOfLoansString);
//B. Enter the Amount/Selling Price of Home
String loanAmountString = JOptionPane.showInputDialog("Enter the loan amount:");
//Convert loanAmountString to double
double loanAmount = Double.parseDouble(loanAmountString);
//C. Enter the Down Payment on the Home
String downPaymentString = JOptionPane.showInputDialog("Enter the down payment on the Home:");
double downPayment = Double.parseDouble(downPaymentString);
//D. Ask the following for as many number of loans they wish to compare
//D1 Get the interest rate
double[] anualInterestRatesArray = new double[numberOfLoans];
double[] monthlyInterestRateArray = new double[numberOfLoans];
int[] numberOfYearsArray = new int[numberOfLoans];
double[] monthlyPaymentArray = new double[numberOfLoans];
double[] totalPaymentArray = new double[numberOfLoans];
for (int i=0; i < numberOfLoans; i++)
{
String annualInterestRateString = JOptionPane.showInputDialog("Enter the interest rate:");
double annualInterestRate = Double.parseDouble(annualInterestRateString);
anualInterestRatesArray[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:");
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);
}
答案 0 :(得分:2)
您需要在循环内执行所有重复处理逻辑,例如for( ... )
循环。使用数组存储贷款数量的不同值。
答案 1 :(得分:1)
使用for loops。
P.S:您也可以使用其他循环[while,do-while]。
答案 2 :(得分:0)
使用for循环的一个例子
int numberOfLoans = Integer.parseInt(numberOfLoansString);
//section of code which shouldnt be repeated here outside the loop.
for( int i = 0; i < numberOfLoans ; i++ )
{
//Write Step D here , because you want it to be repeated
}
答案 3 :(得分:0)
您可能需要使用数组和循环。使用数组存储输入的所有值和循环以获取值。
double[] anualInterestRates = new double[numberOfLoans];
double[] monthlyInterestRates = new double[numberOfLoans];
int[] numberOfyears = new int[numberOfLoans];
然后你可以循环并询问每个贷款价值:
for(int i= 0; i < numberOfLoans; i++){
//get the anual interest rate
anualInterestRates[i] = the anual interets rate gotten
//etc
}
现在你有3个值数组。您可以使用第二个循环来计算输出和显示。