class zatwierdzanie_stylu implements ListSelectionListener{
        public void valueChanged(ListSelectionEvent e){
            ListSelectionModel wybrany_styl=(ListSelectionModel)e.getSource();

            if(!wybrany_styl.isSelectionEmpty()){
                // Find out which indexes are selected.
                int minIndex=wybrany_styl.getMinSelectionIndex();
                int maxIndex=wybrany_styl.getMaxSelectionIndex();
                for(int i=minIndex; i<=maxIndex; i++){
                    if(wybrany_styl.isSelectedIndex(i)){
                        styl_czcionki=i;
                        if(styl_czcionki==0){
                            textArea2.setFont(textArea2.getFont().deriveFont(Font.PLAIN));
                        }
                        else if(styl_czcionki==1){
                            textArea2.setFont(textArea2.getFont().deriveFont(Font.BOLD));
                        }
                        else{
                            textArea2.setFont(textArea2.getFont().deriveFont(Font.ITALIC));
                        }
                    }
                }
            }
        }
    }