Loosing precision when computing

Hi everyone ! I've got a problem with math operation. I loose precision on simple operations, and i can't understand why.
I've got a JTable with several rows. Each row represent a product, that I need to order. After filling this table with some products, some prices, and the number of products to order, the method "computeTotal()" is going to compute the total price of the order. The method will scan the table and read each price, and number of articles to order, and add it to the total price.
The problem : on some basic operations, I'm loosing precision. For example : 4.34 * 45 = 195.3 but my method compute 195.29999999999998 and I don't know why.
here's is the sample of code :
      * Get the total price of an order
      * @return the price of the order
     private double computeTotal(){
          int rowCount = this.tableModel.getRowCount();
          double totalotal = 0;
          for(int i = 0;i < rowCount;i++){
                * To compute the total of a line, I need the number of products ordered, and the price of the product
               int nbArt = ((Integer)tableModel.getValueAt(i,13)).intValue();
               double price = ((BigDecimal)tableModel.getValueAt(i,4)).doubleValue();
               double totalProducut = nbArt * price;
               total += totalProduct;
          return total;
     }what can I do ? what are the possibilities to adjust the precision ?
Thanks a lot for your help.
J�r�me Bogaerts,
Belgium

Hi,
This is a common asked question, and you would have
been able to find the answer if you only googled for
a minute or two.
What Every Computer Scientist Should Know About
Floating-Point Arithmetic
http://docs.sun.com/source/806-3568/ncg_goldberg.html
Use BigDecimal
/KajThanks a lot for your response. Know i've got something to read this night !
Greetings,
J�r�me Bogaerts

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