求壹個 java 個人貸款還款計算器 的源代碼，

public class Pay {

public static void main(String args[]){

String loanString = JOptionPane.showInputDialog("請輸入貸款本金（ loanAmout）:such as 20000.00") ;

double loanAmount= Double.parseDouble(loanString);

String dateString = JOptionPane.showInputDialog("請輸入貸款期（loanDate）:between 24-60");

int loanDate = Integer.parseInt(dateString);

String monthRateString = JOptionPane.showInputDialog("請輸入月利率 (MonthRate):such as 0.00005");

double monthRate = Double.parseDouble(monthRateString);

double pay_Per_Month = (loanAmount+loanAmount * loanDate * monthRate)/loanDate;

JOptionPane.showMessageDialog(null, pay_Per_Month);

}

}