ActionPerformed + a Normal function?

so im very very new to java I just started a few days ago so heres my question:

I want to click on that button

 JButton buttonRandom = new JButton("Roll The Dice");

    buttonRandom.addActionListener(new ActionListener()
    {
        @Override
        public void actionPerformed(ActionEvent arg0)
        {



        }

and then it should change this lable

       JLabel lableNum1 = new JLabel(String.valueOf(zufallsZahlOne));
        lableNum1.setFont(new Font("Tahoma", Font.BOLD, 16));
        lableNum1.setHorizontalAlignment(SwingConstants.CENTER);
       lableNum1.setBounds(10, 11, 66, 51);
       frame.getContentPane().add(lableNum1);

into this random number maybe im just too stupid ^^

public int randomZahlenEins()
{

    Random r = new Random();
    int min = 1;
    int max = 6;
    int zufallsZahlEins = r.nextInt((max - min) + 1) + min;
    return zufallsZahlEins;

}