Please help problem with GUI

Question

Hi
I have two problems firstly when i try to assign a method to a button to a GUI
     JButton SetPrice = new JButton ("Set Price");
        contentPane.add( SetPrice);
         SetPrice.addActionListener(new ActionListener() {
                               public void actionPerformed(ActionEvent e) {  SetPrice ();    }This is teh code i am using to set up teh button on teh display.Belwo is the method it should run.
public double SetPrice( int price)
         if (price <= 199.9){
       Cost= price;
         return Cost;
        else {
          System.out.println ( "Set a price which is less than 199.9");
          return Cost; }
        }When i try to compile it comes up with when i comipile
SetPrice (int) in Shop cannot be applied to ()The variable has type double.So pelase my someone show me how to make the action listener button run this method.
Thanks

Answer 1

JButton SetPrice = new JButton ("Set Price");
        contentPane.add( SetPrice);
         SetPrice.addActionListener(this);
SetPrice.setActionCommand("setprice");
public void actionPerformed(ActionEvent e) {
String action=e.getActionCommand();
if(action.equals("setprice") {
//do something
    }