I have a question on how to calculate with java. In my case, I think I am doing the calculations right, but when I run it, I get a few 0s and some absurd number. How can I fix this? Any help will be greatly appreciated. Below is my code:
public class CO2Footprint {
private int NumberOfPeople, CO2PerPerson, lightBulbs, months;
private double TotalEmission, ReductionPerPaper, ReductionPerPlastic,
ReductionPerGlass, ReductionPerCan, TotalReduction,
FamilyNetEmission, annualGasoline, electricityBill
, lightBulbsRecycled, annualFuelUse, averageMonthlyCostElec,
emissionFactor, monthlyCostSeptElec, monthlyCostOct, monthlyCostNov,
averagePricePerKilowatt, totalWaste, elecPrice, NetEmission;
private boolean paper, plastic, glass, can;
CO2Footprint(int numPeople, boolean bpaper, boolean bplastic, boolean
bglass, boolean bcans, double annuallGasoline
, double electricityyPrice, int lighttBulbs){
NumberOfPeople = 0;
paper = bpaper;
plastic = bplastic;
glass = bglass;
can = bcans;
ReductionPerPaper = 184;
CO2PerPerson = 1018;
ReductionPerPlastic = 25.6;
ReductionPerGlass = 46.6;
ReductionPerCan = 165.8;
TotalEmission = 0;
annualGasoline = 16.5;
electricityBill = 0;
lightBulbs = 10;
lightBulbsRecycled = 0;
annualFuelUse = 0;
averageMonthlyCostElec = 0;
emissionFactor = 1.37;
monthlyCostSeptElec = 551.51;
monthlyCostOct = 392.84;
monthlyCostNov = 445.42;
months = 12;
averagePricePerKilowatt = 4.83;
totalWaste = 0;
NetEmission = 0.0;
}
// method for calculating total emission
public double totalEmission(){
TotalEmission = NumberOfPeople * CO2PerPerson;
return TotalEmission;
}
// method for calculating CO2 reduction
public double reduction(){
TotalReduction = 0;
ReductionPerPaper = 0;
ReductionPerPlastic = 0;
ReductionPerGlass = 0;
ReductionPerCan = 0;
if(paper = true){
ReductionPerPaper = 184;
}else{
ReductionPerPaper = 0;
}
if(plastic = true){
ReductionPerPlastic = 25.6;
}else{
ReductionPerPlastic = 0;
}
if(glass = true){
ReductionPerGlass = 46.6;
}else{
ReductionPerGlass = 0;
}
if(can = true){
ReductionPerCan = 165.8;
}else{
ReductionPerCan = 0;
}
TotalReduction = ReductionPerPaper + ReductionPerPlastic +
ReductionPerGlass + ReductionPerCan + (lightBulbs * 1.37 * 73);
return TotalReduction;
}
public double calcAnnualFuelUseGallonCO2(){
annualFuelUse = annualGasoline * 12 * 12;
return annualFuelUse;
}
public double calcElectricityBill(){
return (averageMonthlyCostElec / averagePricePerKilowatt) * emissionFactor * months;
}
public double electrictyPrice(){
return averagePricePerKilowatt;
}
public double calcWaste(){
TotalReduction = 0;
ReductionPerPaper = 0;
ReductionPerPlastic = 0;
ReductionPerGlass = 0;
ReductionPerCan = 0;
if(paper = true){
ReductionPerPaper = 184;
}else{
ReductionPerPaper = 0;
}
if(plastic = true){
ReductionPerPlastic = 25.6;
}else{
ReductionPerPlastic = 0;
}
if(glass = true){
ReductionPerGlass = 46.6;
}else{
ReductionPerGlass = 0;
}
if(can = true){
ReductionPerCan = 165.8;
}else{
ReductionPerCan = 0;
}
totalWaste = ReductionPerPaper + ReductionPerPlastic +
ReductionPerGlass + ReductionPerCan;
return totalWaste;
}
public double calcBulbsEmissionReduction(){
return lightBulbs * 1.37 * 73;
}
public double calcNetEmission(){
NetEmission = TotalEmission - CO2PerPerson;
return NetEmission;
}
}
If it helps, below is the code for how I called the methods:
import java.util.ArrayList;
public class CO2FootprintTester {
public static void main(String args[]){
ArrayList<CO2Footprint> CO2 = new ArrayList<CO2Footprint>();
CO2.add(new CO2Footprint(1, true, true, true, true, 16.5, 4.83, 10));
CO2Footprint data;
for(int i = 0; i < CO2.size(); i++){
data = CO2.get(i);
data.calcAnnualFuelUseGallonCO2();
data.calcBulbsEmissionReduction();
data.calcElectricityBill();
data.calcWaste();
data.electrictyPrice();
data.reduction();
data.totalEmission();
}
// create table
System.out.println("___________________________________________________"
+ "_____________________________________________________________________________");
System.out.printf("%65s%44s%n", " Pounds of CO2 Emitted From: |",
" Pounds of CO2 Reduced From: ");
System.out.println("___________________________________________________"
+ "_____________________________________________________________________________");
System.out.printf("%1s%25s%25s%25s%25s%n%n", "Gas", "Electricity",
"Waste", "Recycling", "New Bulbs");
// call methods
for(int i = 0; i < CO2.size(); i++){
data = CO2.get(i);
System.out.printf("%5.5f%15.5f%15.5f%15.5f%15.5f", data.calcAnnualFuelUseGallonCO2(), data.calcElectricityBill(),
data.totalEmission(), data.calcNetEmission(), data.calcBulbsEmissionReduction());//,
//data.calcElectricityBill(), data.totalEmission(), data.calcNetEmission(),
//data.calcBulbsEmissionReduction());
}
}
}
