int difficulty;

public int diffRec() {
    //     diff = difficulty;

    switch (comboDifficulty.getSelectedIndex()) {
        case 0:
            difficulty = 0;
            break;
        case 1:
            difficulty = 1;
            break;
        case 2:
            difficulty = 2;
            break;
        default:
            break;
    }
    return (difficulty);

}

public ClickingGame() {

    initComponents();
}