ZCW-MetricConversions-BlueJ/ConversionTool.java

public class ConversionTool {
    
    private static final float CENT_TO_INCH = (float) 2.54;
    
    public static void main(String[] args){}

    public static float CentimetersToInches(float centimeters){
        float inches = centimeters / CENT_TO_INCH;
        return ifNegGetZero(inches);
    }

    public static float InchesToCentimeters(float inches){
        float centimeters = inches * CENT_TO_INCH;
        return ifNegGetZero(centimeters);
    }

    public static float FeetToMeters(float feet){
        float meters = feet / (float)3.28;
        return ifNegGetZero(meters);
    }

    public static float MetersToFeet(float meters){
        float feet = meters * (float)3.2808;
        return ifNegGetZero(feet);
    }

    public static float CelsiusToFahrenheit(float celsius){
        float fahr = celsius * (float)(1.8) + (float)(32);
        return fahr;
    }

    public static float FahrenheitToCelsius(float fahrenheit){
        float cels = (fahrenheit - (float)(32)) / (float) (1.8);
        return cels;
    }

    public static float MphToKph(float mph){
        float kph = mph * (float)(1.60934);
        return ifNegGetZero(kph);
    }

    public static float KphToMph(float kph){
        float mph = kph / (float)(1.60934);
        return ifNegGetZero(mph);
    }
    
    public static float ifNegGetZero(float number){
        if (number >=0) {
            return number;
        } else {
            return 0;
        }
    }
}