import java.util.ArrayList;
import java.util.Collections;

public class DescriptiveStatistics {
    
     ArrayList<Double> collection = new ArrayList<Double>();//Is this right?
    
    private int size;
    private double max;
    private double min;
    
    /**
     * Construct an empty collection of doubles that can store up to any
     * number of floating point numbers as long as the computer has memory.
     */
    public DescriptiveStatistics(){
        
    collection = null;    
    }
    
    /**
     * The size of this collection.
     * @return The number of elements added to this object.
     */
    public int size(){
        size = collection.size();
        
        if (size == 0){
            return 0;
        }
        else
        return size;
    }
    
    /**
     * Add aNumber to the collection while maintaining a natural ordering.
     * Precondition: The computer has enough memory to either add aNumber.
     *
     * @param aNumber is the datum to add to this object without rounding it.
     */
    public void addInOrder(double aNumber){
        
        collection.add(aNumber);
    }