Botões de editar e excluir não funcionam - Java

[BRoleg99]

Olá, estava acompanhado uma vídeo aula por conta de um projeto e tá incompleta, preciso terminar o trabalho de escola e me ajudem a terminar o CRUD, por gentileza, o botão editar e excluir não funciona.

package View;

import Controller.AlunoControl;
import TableModel.AlunoTM;
import javax.swing.JOptionPane;


public class AlunoView extends javax.swing.JFrame {

    AlunoTM Modelo;

    public final void LoadTable() {
        Modelo = new AlunoTM();
        tbl_alunos.setModel(Modelo);

        tbl_alunos.getColumnModel().getColumn(0).setPreferredWidth(100);
        tbl_alunos.getColumnModel().getColumn(1).setPreferredWidth(250);
    }

    public void Botoes(boolean N, boolean E, boolean R, boolean S, boolean C) {
        btn_novo.setEnabled(N);
        btn_editar.setEnabled(E);
        btn_excluir.setEnabled(R);
        btn_salvar.setEnabled(S);
        btn_cancelar.setEnabled(C);
    }

    public AlunoView() {
        initComponents();
        setLocationRelativeTo(null);
        LoadTable();
        tbl_alunos.setModel(Modelo);
        Botoes(true, false, false, false, false);
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        tbl_alunos = new javax.swing.JTable();
        btn_excluir = new javax.swing.JButton();
        btn_novo = new javax.swing.JButton();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        c_nome = new javax.swing.JTextField();
        c_mat = new javax.swing.JTextField();
        btn_cancelar = new javax.swing.JButton();
        btn_salvar = new javax.swing.JButton();
        btn_editar = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        tbl_alunos.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Matrícula", "Nome"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        tbl_alunos.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                tbl_alunosMouseClicked(evt);
            }
        });
        jScrollPane1.setViewportView(tbl_alunos);
        if (tbl_alunos.getColumnModel().getColumnCount() > 0) {
            tbl_alunos.getColumnModel().getColumn(0).setResizable(false);
            tbl_alunos.getColumnModel().getColumn(1).setResizable(false);
        }

        btn_excluir.setText("Excluir");
        btn_excluir.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_excluirActionPerformed(evt);
            }
        });

        btn_novo.setText("Novo");
        btn_novo.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_novoActionPerformed(evt);
            }
        });

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)), "Aluno"));

        jLabel1.setText("Matrícula:");

        jLabel2.setText("Nome:");

        btn_cancelar.setText("Cancelar");
        btn_cancelar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_cancelarActionPerformed(evt);
            }
        });

        btn_salvar.setText("Salvar");
        btn_salvar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_salvarActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(18, 18, 18)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(10, 10, 10)
                                .addComponent(jLabel2))
                            .addComponent(jLabel1))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(c_mat, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(c_nome, javax.swing.GroupLayout.PREFERRED_SIZE, 333, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(131, 131, 131)
                        .addComponent(btn_salvar)
                        .addGap(18, 18, 18)
                        .addComponent(btn_cancelar)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(c_mat, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(c_nome, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btn_cancelar)
                    .addComponent(btn_salvar))
                .addContainerGap(18, Short.MAX_VALUE))
        );

        btn_editar.setText("Editar");
        btn_editar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_editarActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(btn_novo)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btn_editar)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(btn_excluir)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btn_excluir)
                    .addComponent(btn_novo)
                    .addComponent(btn_editar))
                .addGap(18, 18, 18)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void tbl_alunosMouseClicked(java.awt.event.MouseEvent evt) {                                        
        Botoes(true, false, false, false, false);
        int index = tbl_alunos.getSelectedRow();
        if (index >= 0 && index < Modelo.getRowCount()) {
            String[] temp = Modelo.getAluno(index);
            c_mat.setText(temp[0]);
            c_nome.setText(temp[1]);
        }

    }                                       

    private void btn_novoActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Botoes(false, false, false, true, true);
    }                                        

    private void btn_editarActionPerformed(java.awt.event.ActionEvent evt) {                                           
        Botoes(false, false, false, true, true);
    }                                          

    private void btn_excluirActionPerformed(java.awt.event.ActionEvent evt) {                                            
        Botoes(true, false, false, false, false);
    }                                           

    private void btn_salvarActionPerformed(java.awt.event.ActionEvent evt) {                                           

        if (AlunoControl.salvarAluno(c_mat.getText(), c_nome.getText())) {
            this.LoadTable();
            JOptionPane.showMessageDialog(this, "Aluno salvo com sucesso");
            Botoes(true, false, false, false, false);
        }

    }                                          

    private void btn_cancelarActionPerformed(java.awt.event.ActionEvent evt) {                                             
        Botoes(true, false, false, false, false);
    }                                            

    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(AlunoView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(AlunoView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(AlunoView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(AlunoView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new AlunoView().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btn_cancelar;
    private javax.swing.JButton btn_editar;
    private javax.swing.JButton btn_excluir;
    private javax.swing.JButton btn_novo;
    private javax.swing.JButton btn_salvar;
    private javax.swing.JTextField c_mat;
    private javax.swing.JTextField c_nome;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tbl_alunos;
    // End of variables declaration                   
}

package Model;

import Util.Arquivo;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONObject;

/**
 *
 * @author BRoleg
 */
public class Aluno {

    private String Matricula;
    private String Nome;

    public Aluno() {
    }

    public Aluno(String Matricula, String Nome) {
        this.Matricula = Matricula;
        this.Nome = Nome;
    }

    public Aluno(JSONObject json) {
        this.Matricula = json.getString("matricula");
        this.Nome = json.getString("nome");
    }

    public String getMatricula() {
        return Matricula;
    }

    public void setMatricula(String Matricula) {
        this.Matricula = Matricula;
    }

    public String getNome() {
        return Nome;
    }

    public void setNome(String Nome) {
        this.Nome = Nome;
    }

    public JSONObject toJosn() {
        JSONObject json = new JSONObject();
        json.put("Nome", this.Nome);
        json.put("Matricula", this.Matricula);

        return json;
    }

    public boolean Persistir() {
        JSONObject json = this.toJosn();

        String base = Arquivo.Read();
        JSONArray jA = new JSONArray();
        if (!base.isEmpty() && base.length() > 5) {
            jA = new JSONArray(base);
        }

        jA.put(json);

        Arquivo.Write(jA.toString());

        return true;
    }

    public static ArrayList<Aluno> getAlunos() {
        ArrayList<Aluno> alunos = new ArrayList();
        String base = Arquivo.Read();
        if (base.isEmpty() || base.length() < 5) {
            return null;
        }
        JSONArray jA = new JSONArray(base);
        for (int i = 0; i < jA.length(); i++) {
            Aluno A = new Aluno(jA.getJSONObject(i));
            alunos.add(A);
        }
        return alunos;
    }

}

package Controller;

import Model.Aluno;
import java.util.ArrayList;

/**
 *
 * @author BRoleg
 */
public class AlunoControl {

    public static boolean salvarAluno(String Matricula, String Nome) {
        Aluno a = new Aluno(Matricula, Nome);
        return a.Persistir();
    }

    public static ArrayList<String[]> getAlunos() {
        ArrayList<String[]> Alunos = new ArrayList();

        ArrayList<Aluno> A = Aluno.getAlunos();
        if (A != null) {
            for (int i = 0; i < A.size(); i++) {
                String a[] = new String[2];
                a[0] = A.get(i).getMatricula();
                a[1] = A.get(i).getNome();
                Alunos.add(a);
            }
        }
        return Alunos;

    }
}

package TableModel;

import java.util.ArrayList;
import java.util.List;
import javax.swing.table.AbstractTableModel;

/**
 *
 * @author BRoleg
 */
public class AlunoTM extends AbstractTableModel {

    private List<String[]> linhas;
    private String[] colunas = new String[]{"Matricula", "Nome"};

    public AlunoTM() {
        linhas = new ArrayList<String[]>();
    }

    public AlunoTM(List<String[]> lista) {
        linhas = new ArrayList<String[]>(lista);
    }

    @Override
    public int getColumnCount() {
        return colunas.length;
    }

    @Override
    public int getRowCount() {
        return linhas.size();
    }

    @Override
    public String getColumnName(int columnIndex) {
        return colunas[columnIndex];
    }

    @Override
    public Class<?> getColumnClass(int columnIndex) {
        return String.class;
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        String t[] = linhas.get(rowIndex);
        switch (columnIndex) {
            case 0:
                return t[0];
            case 1:
                return t[1];
            default:
                throw new IndexOutOfBoundsException("");
        }
    }

    @Override
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
        String t[] = linhas.get(rowIndex);
        switch (columnIndex) {
            case 0:
                t[0] = aValue.toString();
            case 1:
                t[1] = aValue.toString();

        }
        fireTableCellUpdated(rowIndex, columnIndex);
    }

    public void setValueAt(String aValue[], int rowIndex) {
        String t[] = linhas.get(rowIndex);
        t[0] = aValue[0];
        t[0] = aValue[1];

        fireTableCellUpdated(rowIndex, 0);
        fireTableCellUpdated(rowIndex, 1);
    }

    @Override
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        return false;
    }

    public String[] getAluno(int indiceLinha) {
        return linhas.get(indiceLinha);
    }

    public void addAluno(String a[]) {

        linhas.add(a);
        int ultimoIndice = getRowCount() - 1;
        fireTableRowsInserted(ultimoIndice, ultimoIndice);

    }

    public void remoove(int indiceLinha) {
        linhas.remove(indiceLinha);
        fireTableRowsDeleted(indiceLinha, indiceLinha);
    }

    public void addLista(List<String[]> a) {
        int tamanhoAntigo = getRowCount();

        linhas.addAll(a);
        fireTableRowsInserted(tamanhoAntigo, getRowCount() - 1);

    }

    public void limpar() {
        linhas.clear();
        fireTableDataChanged();
    }

    public boolean isEmpty() {
        return linhas.isEmpty();
    }
}

[rodriguesabner]

@BRoleg99

    public void Botoes(boolean N, boolean E, boolean R, boolean S, boolean C) {
        btn_novo.setEnabled(N);
        btn_editar.setEnabled(E);
        btn_excluir.setEnabled(R);
        btn_salvar.setEnabled(S);
        btn_cancelar.setEnabled(C);
    }

O que seria funcionar nesse caso? Só mudar o valor?