private class ParedeDeJanela implements ActionListener {
        public void actionPerformed(ActionEvent e)
        {
            String Texto=null;
            String SaidaSalva=("Salvando");
            String SaidaSemSalvar=("Saindo sem salvar");
            Texto = JOptionPane.showInputDialog("Deseja salvar? (sim/nao)");
            if(Texto.equals("Sim")==true || Texto.equals("sim")==true){
                JOptionPane.showMessageDialog(null, SaidaSalva);
                String string1 = new String(SaidaSalva);
                System.out.println(string1);

                JFileChooser j= new JFileChooser();

                int returnVal = j.showSaveDialog(Janela.this);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                    try {
                        String arquivo = j.getSelectedFile().getAbsolutePath();
                    if(!arquivo.endsWith(".paint"))
                                    arquivo+=".paint";
                    FileWriter fw = new FileWriter(arquivo);
                        for(int k = 0; k<figuras.size(); k++){
                            fw.write(figuras.elementAt(k).toString());
                            fw.write("\n");
                        }
                        fw.close();
                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }
            System.exit(0);

            }
            else{
                JOptionPane.showMessageDialog(null, SaidaSemSalvar);
                String string1 = new String(SaidaSemSalvar);
                System.out.println(string1);
                System.exit(0);
            }
        }
    }