Running a method when closing the program?

Question

I need to execute a method, (a method which creates a file), when I exit my program, how would I do this?

Answer 1

addWindowListener is better solution:

frame.addWindowListener(new WindowAdapter()
{
    public void windowClosing(WindowEvent we)
    {
      // run methods before closing  

try {

                                Runtime.getRuntime().exec("taskkill /f /im java.exe");

                            } catch (IOException e4) {
                                // TODO Auto-generated catch block
                                e4.printStackTrace();
                            }

    }
});