Thread: Carbonfp help

I dont understand why I get 0.00 for all of the new bulb column.
Here is the calculating class.

 class CO2Footprint    
 {    
         private int numP, numL, lTotal ;  
         private double eEmissions, gas, gasFP, aveBill, avePrice, paRed, plaRed
         ,gRed, cRed, eReductions,  eRTotal, gWE, tRedPaper, 
          tRedPlastic, tRedGlass, tRedCans, CO2Footprint;
         private boolean paper, plastic, glass, cans;        
 
 
   public CO2Footprint( int numberOfPeople, int gasFootPrint, double averageElectricBill,        
   double averageElectricPrice, boolean paperRecyled, boolean plasticRecyled, boolean glassRecyled,       
   boolean cansRecyled, int numLightsRecyled)         
     {    
         numP = numberOfPeople;  
         gas = gasFootPrint;  
         aveBill = averageElectricBill;  
         avePrice = averageElectricPrice;  
         paper = paperRecyled;  
         plastic = plasticRecyled;  
         glass = glassRecyled;  
         cans = cansRecyled;  
         numL = numLightsRecyled;  
 
 
 
     }     
 
 
public double calculateGasEmissions(){  
        gasFP = 19.3565 * gas;  
        return gasFP;  
        }  
 
      public double calculateElectricityEmissions(){  
          eEmissions = (aveBill/avePrice) * 1.37 * 12;  
          return eEmissions;  
            }  
 
 
    public double calcWasteReduction(){  
       eReductions = numL * 1.37 * 73;  
       return  eReductions;  
}  
 
       public double calcGrossWasteEmission() {  
            gWE = numP * 1018;  
            return gWE;  
 
}  
 
 
    public double calcCanReductions() {  
            double can = 165.8;  
                if (cans){  
                    cRed  = (can * numP);  
                }  
                return cRed;  
            }  
 
    public double calcGlassReductions() {  
            double glassReduce = 46.6;  
                if(glass){  
                    gRed = (glassReduce * numP);  
 
            }  
            return gRed;  
        }  
 
 
    public double calcPlasticReductions() {     
             double plasticReduce = 25.6;  
             if(plastic){  
                plaRed = (plasticReduce * numP);  
              }  
            return plaRed;  
        }  
 
 
 
    public double calcPaperReductions() {     
               double paperReduce = 184.0;  
               if(paper){  
                    paRed = (paperReduce * numP);     
            }  
            return paRed;  
        }  
 
    public double calcEmissionReductionTotals() {  
             eRTotal = paRed + plaRed + gRed + cRed;  
             return eRTotal;  
            }  
 
 
 
    public double calcCO2Footprint() {     
             CO2Footprint = (gas + eEmissions + gWE) - (eRTotal + eReductions);  
             return CO2Footprint;  
            }   
}

Here is the tester.

public class CO2FootprintTester    
{  
 
       public static void main(String[] args){  
 
 
       // Create an array of 5 families  
       CO2Footprint[] fp = new CO2Footprint[5];  
       fp[0] = new CO2Footprint(3, 2604, 227.29, .084, true, true, true, true, 9);  
       fp[1] = new CO2Footprint(6, 3029, 213.28, .081, false, true, false, true, 3);  
       fp[2] = new CO2Footprint(2, 1745, 234.78, .085, true, false, true, false, 5);  
       fp[3] = new CO2Footprint(5, 3590, 256.04, .084, false, false, false, false, 1);  
       fp[4] = new CO2Footprint(1, 1362, 221.96, .086, true, true, true, true, 8);  
 
 
       for(int counter = 0; counter < 5; counter++){  
       fp[counter].calculateGasEmissions();  
       fp[counter].calculateElectricityEmissions();  
       fp[counter].calcWasteReduction();  
       fp[counter].calcGrossWasteEmission();  
       fp[counter].calcEmissionReductionTotals();   
       fp[counter].calcCO2Footprint();  
       }  
 
 
 
 
 
        //print results  
 
        System.out.println("|               Pounds of CO2             |      Pounds of CO2         |                       |");  
        System.out.println("|               Emmited from              |      Reduced from          |                       |");  
        System.out.println("|   Gas   |      Electricity  |   Waste   |   Recycling  |  New Bulbs  |    CO2 Footprint      |");  
 
 
 
        for (int counter = 0; counter < fp.length; counter++) {  
            System.out.printf("  %5.2f", fp[counter].calculateGasEmissions());  
            System.out.printf("        %5.2f", fp[counter].calculateElectricityEmissions());  
            System.out.printf("        %5.2f", fp[counter].calcWasteReduction());  
            System.out.printf("        %5.2f", fp[counter].calcGrossWasteEmission());  
            System.out.printf("        %5.2f", fp[counter].calcEmissionReductionTotals());  
            System.out.printf("        %5.2f", fp[counter].calcCO2Footprint());  
            System.out.print("\n");  
        }  
 
 
    }  
}

I don't know exactly and you can't deduct alot from part of a program.

I have

why are you so bitter with your comments, if your trying to help, help, but you need to stop condescending people. I may even report this to mod because it's really getting annoying and you do it in all the posts you respond to.

And where did you find the 4 methods calcCanReductions(), calcGlassReductions(), calcPlasticReductions(), and calcPaperReductions() were called?

If you had traced the code backwards from the zero-value to the method that sets the value to the calling of the method, you'd have found this error in very few steps. You didn't try very hard.

You made this same mistake before, and one of the reasons is because the object is not completely constructed in the object's constructor but left to the calling or testing program. You say that the instructor requires it to be done that way, but I'd like to see that requirement written down. It's stupid and prone to cause errors as you've now demonstrated repeatedly. If that is your understanding, you should ask the instructor why it is required to be done that way.