package criaframe;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import javax.swing.*;
import java.awt.Color;

public class CriaFrame extends JFrame {

	public static void main(String[] args) {
        tela = new CriaFrame();
        tela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    private static CriaFrame tela;
    private JLabel lbln1;
    private JLabel lbln2;
    private JLabel lbln3;
    private JLabel lbln4;
    private JLabel lblpro;
    private JTextField tftnota1;
    private JTextField tftnota2;
    private JTextField tftnota3;
    private JTextField tftnota4;
    private JButton btcalcular;
    private JButton btlinpar;

    public CriaFrame() {

        setTitle("Meu primeiro programa Visual");
        setBounds(0, 0, 300, 400);
        setLayout(null);
        setVisible(true);
        lblpro = new JLabel();
        lbln1 = new JLabel();
        lbln2 = new JLabel();
        lbln3 = new JLabel();
        lbln4 = new JLabel();

        lblpro.setBounds(40, 30, 200, 25);
        lbln1.setBounds(40, 75, 40, 25);
        lbln2.setBounds(40, 75, 80, 125);
        lbln3.setBounds(40, 75, 120, 225);
        lbln4.setBounds(40, 75, 160, 325);


        lblpro.setText("Calculando Média Dos Alunos.");

        lbln1.setText("Nota 1");
        lbln2.setText("Nota 2");
        lbln3.setText("Nota 3");
        lbln4.setText("Nota 4");

        tftnota1 = new JTextField();
        tftnota2 = new JTextField();
        tftnota3 = new JTextField();
        tftnota4 = new JTextField();


        tftnota1.setBounds(110, 75, 120, 25);
        tftnota2.setBounds(110, 125, 120, 25);
        tftnota3.setBounds(110, 175, 120, 25);
        tftnota4.setBounds(110, 225, 120, 25);

        btcalcular = new JButton("Calcular");
        btlinpar = new JButton();
        btcalcular.setBounds(130, 270, 85, 26);
        btlinpar.setBounds(20, 270, 85, 26);

        btcalcular.setText("Calcular");
        btlinpar.setText("Linpar");
        TratadorDeEventos t = new TratadorDeEventos();
	btcalcular.addActionListener(t);
        btcalcular.addActionListener(this);

        btcalcular.addActionListener (new TratadorDeEventos ());

        add(btcalcular);
        add(btlinpar);
        add(lbln1);
        add(lbln2);
        add(lbln3);
        add(lbln4);
        add(tftnota1);
        add(tftnota2);
        add(tftnota3);
        add(tftnota4);
        add(lblpro);
    }
  private class TratadorDeEventos implements ActionListener {
       double media;
            public void actionPerformed (ActionEvent e){
                try {
                        media = (tftnota1+tftnota2+tftnota3+tftnota4)/4;
    media = Double.parseDouble(JOptionPane.showMessageDialog(null,media+"MEDIA É"));

else


                }catch(Exception ex)
                {
                    JOptionPane.showMessageDialog(null, "Erro");
                    ex.printStackTrace();

                     }
              }
        }