mortgeage calculator help
Here is my code for the mortgage calculator. Please look over it and tell me where I am going wrong. The third and last lines is where I get my errors tell, what is needed.
import java.io.*;
import static java.lang.Math.*;
public class keyin.java //Class for input streams into your code <'{' expected
{
public static String readln()
{
StringBuffer resp = new StringBuffer();//resp for user response
try // This is a form of error trap - in tells the compiler to "try" the code
{
BufferedInputStream keybuff = new BufferedInputStream(System.in); //key buffer
int ks = 0; //initializing the key stroke variable
char keyChar;
do //start of a do while loop for building the input string
{ //This code block is capturing characters from the KB and appending
//them together
ks = keybuff.read();
keyChar = (char) ks; // notice the type cast (char) since keyboarding
if (ks != -1)// is really one character at a time
{// the keycode integers are type cast into characters for appending
resp.append(keyChar);
}
}
while ((ks != -1) & (keyChar != '\n')); //breaks the loop if the enter key is hit
keybuff.close();
return resp.toString();
}
catch (IOException e) //this is the second part of an error trap that catches the error
{ // from the try block of code
System.out.println("Exception: " + e.getMessage());
return null;
}
}
public static void main(String[] arguments)//Sample used to get loan amt
{
Double tempAmt; //Object type to convert string value
Double tempYears;
double loanYears;
double amtPrin; // Original Loan Amount Variable
double annIntRate; //Annual Interest Rate
double monthIntRate; //Monthly rate for compound amount
double loanMonths; //Loan period in Months for calculation
double monPmt; //Variable to hold monthly payment
float adjmopmt; //variable for rounding monthly payment
double displayRate;
loanYears = 30; //Fixed 30 year loans
annIntRate = .06; //Fixed rate at 6%
displayRate = (annIntRate * 100);
monthIntRate = (annIntRate / 12);
loanMonths = (loanYears * 12);
//Loan Menu
System.out.println("*****************************************************");
System.out.println("SIMPLE HOME LOAN PAYMENT CALCULATOR");
System.out.println("*****************************************************");
System.out.print("How much do is the New Home?\n");
String input = keyin.readln();
//The next 2 lines of code convert the object string to an object Double
//The Object Double can then be converted to a primitive double for calculation
tempAmt = Double.valueOf(input); //Extracts the Object Double to tempAmt var
amtPrin = tempAmt.doubleValue(); //converts double from object Double
//Display results
System.out.println("*****************************************************");
System.out.println("Initial Price:\t $" + amtPrin);
System.out.println("Annual Rate:\t" + displayRate + " Percent");
System.out.println("Years:\t" + loanYears);
System.out.println("Monthly Interest Rate:\t:" + monthIntRate);
System.out.println("Loan in Months:\t" + loanMonths);
//Monthly Payment formula - I am not to sure how accurate the math is, it's close
monPmt = (double) (amtPrin * monthIntRate) / (1 - Math.pow (1 + monthIntRate,-1 * loanMonths));
//Uses a rounding method in Math to limit the zeros in the display
adjmopmt = (float) Math.round(monPmt);
System.out.println("*****************************************************");
System.out.println("Amount Borrowed:\t $" + amtPrin);
System.out.println("Estimated Monthly Payment:\t $" + adjmopmt);
}
'}' <--'}' expected
