public Colocviu()
{
    super( "Colocviu 2016-2017" );

    pnPanel0 = new JPanel();
    GridBagLayout gbPanel0 = new GridBagLayout();
    GridBagConstraints gbcPanel0 = new GridBagConstraints();
    pnPanel0.setLayout( gbPanel0 );

    lbLabel0 = new JLabel( "Nume"  );
    gbPanel0.setConstraints( lbLabel0, gbcPanel0 );
    pnPanel0.add( lbLabel0 );

    tf0 = new JTextField( );
    gbPanel0.setConstraints( tf0, gbcPanel0 );
    pnPanel0.add( tf0 );

    lbLabel1 = new JLabel( "Prenume"  );
    lbLabel1.setConstraints( lbLabel1, gbcPanel0 );
    pnPanel0.add( lbLabel1 );

    tf1 = new JTextField( );
    gbPanel0.setConstraints( tf1, gbcPanel0 );
    pnPanel0.add( tf1 );

    lbLabel2 = new JLabel( "Cetatenie"  );
    lbLabel2.setConstraints( lbLabel2, gbcPanel0 );
    pnPanel0.add( lbLabel2 );

    bG = new ButtonGroup();

    rbRdButCetatenie = new JRadioButton( "Romana"  );
    rbgPanel0.add( rbRdButCetatenie );
    gbPanel0.setConstraints( rbRdButCetatenie, gbcPanel0 );
    bG.add(rbRdButCetatenie)

    rbRdButCetatenie2 = new JRadioButton( "Strain-UE"  );
    rbgPanel0.add( rbRdButCetatenie2 );
    gbPanel0.setConstraints( rbRdButCetatenie2, gbcPanel0 );
    bG.add(rbRdButCetatenie2)

    rbRdButCetatenie3 = new JRadioButton( "Strain-nonUE"  );
    rbgPanel0.add( rbRdButCetatenie3 );
    gbPanel0.setConstraints( rbRdButCetatenie3, gbcPanel0 );
    bG.add(rbRdButCetatenie3)

    pnPanel0.add( bG );

    lbLabel3 = new JLabel( "Tara"  );
    lbLabel3.setConstraints( lbLabel3, gbcPanel0 );
    pnPanel0.add( lbLabel3 );

    String []dataComboTara = { "Romania", "Anglia" };
    cmbComboTara = new JComboBox( dataComboTara );
    gbPanel0.setConstraints( cmbComboTara, gbcPanel0 );
    pnPanel0.add( cmbComboTara );

    lbLabel4 = new JLabel( "Actiuni"  );
    lbLabel4.setConstraints( lbLabel4, gbcPanel0 );
    pnPanel0.add( lbLabel4 );

    btBtnAfisare = new JButton( "Afisare pe ecran"  );
    btBtnAfisare.addActionListener(this);
    gbPanel0.setConstraints( btBtnAfisare, gbcPanel0 );

    btBtnAdauga = new JButton( "Adauga in BD"  );
    btBtnAdauga.addActionListener(this);
    gbPanel0.setConstraints( btBtnAdauga, gbcPanel0 );

    setDefaultCloseOperation( EXIT_ON_CLOSE );

    setContentPane( pnPanel0 );
    pack();
    setVisible( true );

    btBtnAfisare.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            labelAfisare.setText(
                "Nume: " + tf0 + "<br>" +
                "Prenume: " + tf1 + "<br>" +
                "Nationalitate: " + bG.getSelection().getActionCommand() + "<br>" +
                "Tara: " + dataComboTara.getSelectedItem().toString() + "<br>"
            );
        }
    });

    btBtnAdauga.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/student", "user", "pass");
            Statement stmt = connection.createStatement();
            stmt.executeUpdate(
            "INSERT INTO colocviu ('nume', 'prenume', 'nationalitate', 'tara') VALUES " +
            "(" + tf0 + ", " + tf1 + ", " + bG.getSelection().getActionCommand() + ", " + dataComboTara.getSelectedItem().toString() + ")");
        }
    });
}