/*
 * MortgageCalculator.java
 *
 */


public class MortgageCalculator { 
    public static int defaultYears = 30; 
    public static float defaultLoanAmount = 200000; 
    public static float defaultInterestRate = (float)0.0575; 

    private int Years; 
    private float LoanAmount; 
    private float InterestRate; 
    private float MonthlyPayment; 

        /** Creates a new instance of MortgageCalculator */

    public MortgageCalculator(int years, float LA, float IR){ 
        Years = years; 
        LoanAmount = LA; 
        InterestRate = IR; 
    } 

    public int GetYears(){ 
        return Years; 
    } 
    public void SetYears(int Years){ 
        this.Years = Years; 
    } 

    public float GetLoanAmount(){ 
        return LoanAmount; 
    } 
    public void SetLoanAmount(float LoanAmount){ 
        this.LoanAmount = LoanAmount; 
    } 

    public float GetInterestRate(){ 
        return InterestRate; 
    } 
    public void SetInterestRate(float InterestRate){ 
        this.InterestRate = InterestRate; 
    } 

    public float GetMonthlyPayment(){ 
        return MonthlyPayment; 
    } 

    // using the equation to calculate the monthly payment 
    public void CalcMonthlyPayment() {    
        
        float temp = (float)Math.pow((InterestRate + 1), (- 12 * Years));
        
        MonthlyPayment = 
        LoanAmount * (InterestRate / (1 - temp)) ; 

    } 

    //To convert a float value into a string, 
    public String ToString (float value){ 
        return Float.toString(value); 
    } 

    //display the monthly payment, since the actually display is related to the UI //design which isn’t required here, so this function only convert the //MonthlyPayment from numeric format to a string. 
    public String DisplayMonthlyPayment(){ 
        return ToString(MonthlyPayment); 
    } 
}