Java headache problem

[MisterX]

feast your eyes on 31 errors of pure Java!
File 1:
public class SellStock
{
public SellStock()
{
price = 0;
numbers = 0;
value = 0;
commission = 0;
rate = 0;
proceeds = 0;
}
public void addPrice(double count)
{
price = price + count;
}
public void addNumbers(int count)
{
numbers = numbers + count;
}
public void addRate(double count)
{
rate = rate + count;
}
public void addValue()
{
value = price * numbers
}
public void addCommission (double rate)
{
commission = value * (rate/100);
}
public double getProceeds()
{
return value - commission;
}
}

File 2:

public class SellStockTest
{
public static void main(String[] args)
{
SellStock iSellStock = new SellStock();
iSellStock.addPrice(10.125);
iSellStock.addNumbers(11);
iSellStock.addCommission(1.5);
double totalValue = iSellStock.getProceeds();
System.out.print("This program calculates the net proceeds from a sale of stock to be:");
System.out.println(getProceeds);
}
}