I have the following code. Which is "correct" and which I do not understand:

private static void updateGUI(final int i, final JLabel label) {
    SwingUtilities.invokeLater( 
        new Runnable() {
            public void run() {
                label.setText("You have " + i + " seconds.");
            }
        }
    );
}

I create a new instance of the Runnable class and then in the run method of this instance I use variables label and i. It works, but I do not understand why it work. Why the considered object sees values of these variables.

According to my understanding the code should look like that (and its wrong):

private static void updateGUI(final int i, final JLabel label) { SwingUtilities.invokeLater(new Runnable(i,label) {

    public Runnable(int i, JLabel label) {
        this.i = i;
        this.label = label;
    }

    public void run() {
        label.setText("You have " + i + " seconds.");
    }

});

}

So, I would give the i and label variables to the constructor so the object can access them...

By the way, in the updateGUI I use final before the i and label. I think I used final because compiler wanted that. But I do not understand why.