Rozwiązanie zadania z #main z 24 października 2016

CoffeePriceCalculator.java

public class CoffeePriceCalculator {
    
    public double getFinalPrice(double cofeePrice, int taxPercents, int tipPercents) {
        long roundedAmountInGrosze = Math.round(cofeePrice*(100 + taxPercents + tipPercents));
        return roundedAmountInGrosze/100.0;
    }

}

CoffeePriceCalculatorFinal.java

import java.math.BigDecimal;
import java.math.RoundingMode;

public class CofeePriceCalculator {
    
    public BigDecimal getFinalPrice(BigDecimal cofeePrice, int taxPercents, int tipPercents) {
        BigDecimal amountInGrosze = cofeePrice.multiply(BigDecimal.valueOf(100 + taxPercents + tipPercents));
        BigDecimal result = amountInGrosze.divide(BigDecimal.valueOf(100), 2, RoundingMode.HALF_UP);
        return result;
    }

}