Java Programming

import java.util.ArrayList;
public class StatsData {
    
    /** Creates a new instance of StatsData */
    public StatsData() {
        data = new ArrayList<Double>();
        
    }
    
    public int count(){
   int count = 0;
   for (int i = 1; i < data.size(); i++) 
       {
         if (count < data.size()) 
             count++;
       }
 return count;
    }
    
    public double max()
{

    double max = 0;
     for (int i = 0; i < data.size(); i++) 
      {
         double a = data.get(i);
         if ( a > max)
          max = a;
      }       
    return max;
   }
     public double min()
{

    double min = 99999;
     for (int i = 0; i < data.size(); i++) 
      {
         double a = data.get(i);
         if (min > a)
          min = a;
      }       
    return min;
   }

    public double mean(){
        double mean1 = 0.0;
        double mean2;
        for (int i = 0; i < data.size(); i++) 
       {
        mean1 += data.get(i) + mean1;
        }
        mean2 = mean1 / this.count();
        return mean2;
    }
    public double variance(){
        double deviation = 0.0;
        double devsum = 0.0;
        for (int i = 0; i < data.size(); i++) {
        deviation = (double)data.get(i) - this.mean();
        devsum += Math.pow(deviation, 2);
        }
        return (devsum / (data.size() - 1));
    }
    
    public void histogram(int numClasses){
       
        int frequency[];
        int k = 0;
        double midpoint = 0;
        frequency = new int[numClasses];
        
        int classWidth = 0;
        classWidth = (((int)this.max() - (int)this.min()) + 1) / numClasses; 
      
        for (int i = 0; i < data.size() - 1; i++){
        if ((0 <= i) && (i < numClasses)){
            if ((((this.min() - 0.5) + (data.get(i)*classWidth)) <= data.get(i)) && ( data.get(i) < ((this.min() - 0.5) + ((data.get(i)+1)*classWidth))))
            k = (int)((data.get(i) - (this.min() - 0.5) / classWidth));
            frequency[k]++;}}
         
           
        for (int i = 0; i < numClasses; i++){
            midpoint = (int)this.min() - 0.5 + (k + 0.5) * classWidth;
               System.out.println(""+midpoint+" |");
           for (int j = 1; j < frequency; j++){

System.out.println("*");

}

System.out.println(); 

}

}

public ArrayList<Double> data;



}





I input an ArrayList full of numbers in another class and it's supposed to print out a Frequency Histogram. Something like this:



Assuming numClasses = 10:



Frequency Histogram

23.9 | *

26.8 | *

29.7 | **

32.7 | *

35.6 | **

38.5 | ******

41.4 | *****

44.4 | ***

47.3 | **

50.2 | **



But the way I have it set up, it's printing it out like this.



94999.0 |

94999.0 |

94999.0 |

94999.0 |

94999.0 |

94999.0 |



And I know that means I messed up the min() method abd I know that's not the only thing I messed up, but I don't know how to fix it and I have so much other homework to do. I really need help. Please help, someone. 



More details on the Histogram Method:



The approach we will take to generate the histogram is to first create an

integer array containing the frequencies of data per class. When there are

numClasses number of elements in the frequency array, the classWidth is

given by the formula classWidth =

max&#8722;min +1 * numClasses . An element x belongs to

class i if (min &#8722; 0 . 5)+ i � classWidth x < (min &#8722; 0 . 5)+( i +1)�classWidth ,

where 0 i < numClasses . So we determine the class to which an element

belongs by the formula i =

x i &#8722;min&#8722;0 . 5 * classWidth , ignoring the fractional part of the

number. So if i = 0 . 7, the the number belongs to class 0. The number of

asterisks on the a bar of the histogram corresponds to the frequency of a

class; that is, the tally of data elements that fall in the class interval given

above. Additionally, we will print the midpoint of each class. The midpoint

of class