[RSTI 2023] Projeto agenda - classe principal

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;

/**
 *
 * @author Professor
 */
public class Agenda {

    static void janelaListar() {
        JFrame j2 = new JFrame("Listar agenda");
        j2.setSize(500, 500);
        j2.setLocationRelativeTo(j2);
        j2.setResizable(false);
        JPanel p = new JPanel();
        GridBagLayout layout = new GridBagLayout();

        p.setLayout(layout);

        p.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        p.setPreferredSize(new Dimension(450, 400));


        JButton jbtEditar = new JButton("Editar contato");
        JButton jbtExcluir = new JButton("Excluir contato");




        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 0;
        p.add(jbtEditar, gbc);
        GridBagConstraints gbc1 = new GridBagConstraints();
        gbc1.gridx = 1;
        gbc1.gridy = 0;
        gbc1.gridwidth = GridBagConstraints.REMAINDER;

        p.add(jbtExcluir,gbc1);


        String[] colunas = {"Código",
            "Nome",
            "Telefone",
            "E-mail"};
        JTable jtbLista = new JTable(null, colunas);

        DefaultTableModel modelo = (new DefaultTableModel(null, colunas) {
            @Override
            public boolean isCellEditable(int row, int column) {
                return false;
            }
        });

        jtbLista.setModel(modelo);
        Contatos c = new Contatos();

        ArrayList<Contatos> dados = c.listar();
        for (Contatos cn : dados) {
            Object[] objs = {cn.getIdContato(), cn.getNome(), cn.getTelefone(), cn.getEmail()};

            modelo.addRow(objs);
        }



        JTableHeader header = jtbLista.getTableHeader();
        header.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 0));
        header.setPreferredSize(new Dimension(400, 30));




        GridBagConstraints gbc2 = new GridBagConstraints();
        gbc2.insets = new Insets(3,3,3,3);
        gbc2.gridx = 0;
        gbc2.gridy = 1;
        gbc2.fill = GridBagConstraints.VERTICAL;
        p.add(header,gbc2);

        GridBagConstraints gbc3 = new GridBagConstraints();

        gbc3.gridx = 0;
        gbc3.gridy = 2;
        gbc3.weightx = 1.0;
        gbc3.weighty = 1.0;
        gbc3.gridwidth = GridBagConstraints.REMAINDER;
        gbc3.fill = GridBagConstraints.BOTH;

        JScrollPane js = new JScrollPane(jtbLista);
        js.setPreferredSize(new Dimension(10, 400));


        p.add(js,gbc3);




        j2.add(p);
        j2.pack();
        j2.setVisible(true);



        jbtEditar.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                int column = 0;
                int row = jtbLista.getSelectedRow();
                String idContato = jtbLista.getModel().getValueAt(row, column).toString();
                System.out.println("Contato selecionado: "+ idContato);
                //agora tem que ter uma janela para carregar o contato (tem um método que busca os dados
                //e alterar o contato

            }
        });


    }

    static void janelaInserir() {
        JFrame j = new JFrame("Inserir dados");
        j.setSize(400, 300);
        j.setLocationRelativeTo(j);

        j.setResizable(false);

        JPanel p = new JPanel();
        p.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        GridLayout layout = new GridLayout(0, 2, 30, 30);
        p.setLayout(layout);

        JLabel lbNome = new JLabel("Nome:");
        lbNome.setHorizontalAlignment(JLabel.LEFT);
        lbNome.setHorizontalTextPosition(JLabel.LEFT);
        p.add(lbNome);

        JTextField jtxNome = new JTextField();
        jtxNome.setPreferredSize(new Dimension(50, 24));
        p.add(jtxNome);

        JLabel lbTelefone = new JLabel("Telefone:");
        lbTelefone.setHorizontalAlignment(JLabel.LEFT);
        lbTelefone.setHorizontalTextPosition(JLabel.LEFT);
        p.add(lbTelefone);

        JTextField jtxTelefone = new JTextField();
        jtxTelefone.setPreferredSize(new Dimension(50, 24));
        p.add(jtxTelefone);

        JLabel lbEmail = new JLabel("E-mail:");
        lbEmail.setHorizontalAlignment(JLabel.LEFT);
        lbEmail.setHorizontalTextPosition(JLabel.LEFT);
        p.add(lbEmail);

        JTextField jtxEmail = new JTextField();
        jtxEmail.setPreferredSize(new Dimension(50, 24));
        p.add(jtxEmail);

        JButton jbtInserir = new JButton("Inserir contato");

        jbtInserir.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {

                try {

                    String nome = jtxNome.getText();
                    String telefone = jtxTelefone.getText();
                    String email = jtxEmail.getText();

                    Contatos c = new Contatos();

                    c.setEmail(email);
                    c.setNome(nome);
                    c.setTelefone(telefone);
                    c.inserir();

                    j.dispose();

                } catch (Exception e) {
                    // Logger.getLogger(Pedido.class.getName()).log(Level.SEVERE, null, e);
                }

            }
        });

        JButton jBtLimpar = new JButton("Limpar");

        jBtLimpar.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {

                jtxNome.setText("");
                jtxTelefone.setText("");
                jtxEmail.setText("");

            }
        });

        jBtLimpar.setBounds(50, 100, 95, 30);
        jbtInserir.setBounds(50, 100, 95, 30);

        p.add(jbtInserir);
        p.add(jBtLimpar);

        p.setPreferredSize(new Dimension(400, 400));
        p.setMaximumSize(new Dimension(400, 400));

        j.add(p);
        j.pack();

        j.setVisible(true);
    }

    public static void main(String[] args) {
        JFrame j = new JFrame("AGENDA DE CONTATOS");

        JPanel p = new JPanel();
        p.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        JButton jBtCadastrar = new JButton("Cadastrar Contato");

        jBtCadastrar.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {

                janelaInserir();
            }
        });

        p.add(jBtCadastrar);

        JButton jBtListar = new JButton("Listar Contatos");

        jBtListar.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {

                janelaListar();
            }
        });

        p.add(jBtCadastrar);
        p.add(jBtListar);

        j.add(p);
        j.setSize(300, 300);
        j.setLocationRelativeTo(j);
        j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        j.setResizable(false);
        j.setVisible(true);

    }
}