Addition help

Hi all,

I was wondering if you could help me with the following problem. I need help adding the prices together, I am confused on what the code is. The following code is correct, just I don't know how to add the prices together. e.g.

2 waters and 1 food equals £3.15

Code:

---

public void actionPerformed(ActionEvent e) {

DecimalFormat pound= new DecimalFormat("#.##");

select= (String) JOptionPane.showInputDialog 
  (project.this,"Select",
  Select,JOptionPane.INFORMATION_MESSAGE, null, products,
  "food");
                 
            if (select.equals("food"))
                      price = 0.65;
             
              else if (select.equals("water"))
                      listprices = 1.25;
             
              else
                      price = 0.0;
                       
  listmodel.addElement(select+ " £" +pound.format(price));
}

---

Thanks in advance,

hypon