ZCW-MetricConversions-BlueJ/ConversionTool.java

public class ConversionTool {
    public static final float CM_CONVERT = 0.3937008f;
    public static final float IN_CONVERT = 2.54f;
    public static final float FT_CONVERT = 3.28f;
    public static final float M_CONVERT = 0.3048f;
    public static final float CELSIUS_CONVERT = 1.8f;
    public static final float CELSIUS_CSTNT2 = 32.0f;
    public static final float FAHRENHT_CONVERT = 32.0f;
    public static final float FAHRENHT_CSTNT2 = 5.0f;
    public static final float FAHRENHT_CSTNT3 = 9.0f;
    public static final float MPH_CONVERT = 1.6093440f;
    public static final float KPH_CONVERT = 0.6214f;
    
    public static float cmToInches;
    public static float inchesToCm;
    public static float ftToMeters;
    public static float metersToFt;
    public static float mphToKph;
    public static float kphToMph;
    
    public static void main(String[] args){}
    
    public static float CentimetersToInches(float centimeters){
        cmToInches = centimeters * CM_CONVERT;
        if(cmToInches < 0) {return 0f;}
        else
        return cmToInches;
    }

    public static float InchesToCentimeters(float inches){
        inchesToCm = inches * IN_CONVERT;
        if(inchesToCm < 0) {return 0f;}
        else
        return inchesToCm;
    }

    public static float FeetToMeters(float feet){
        ftToMeters = feet / FT_CONVERT;
        if(ftToMeters < 0) {return 0f;}
        else
        return ftToMeters;
    }
    
    public static float MetersToFeet(float meters){
        metersToFt = meters / M_CONVERT;
        if(metersToFt < 0) {return 0f;}
        else
        return metersToFt;
    }
    
    public static float CelsiusToFahrenheit(float celsius){
        return (CELSIUS_CONVERT * celsius) + CELSIUS_CSTNT2;
    }
    
    public static float FahrenheitToCelsius(float fahrenheit){
        return ((fahrenheit - FAHRENHT_CONVERT) * FAHRENHT_CSTNT2) / FAHRENHT_CSTNT3;
    }

    public static float MphToKph(float mph){
        mphToKph = mph * MPH_CONVERT;
        if(mphToKph < 0) {return 0f;}
        else        
        return mphToKph;
    }
    
    public static float KphToMph(float kph){
        kphToMph = kph * KPH_CONVERT;
        if(kphToMph < 0) {return 0f;}
        else        
        return kphToMph;
    }
}