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UNIVERSIDADE VEIGA DE ALMEIDA – UVA CURSO SUPERIOR EM SITEMAS DE INFORMAÇÃO ATIVIDADE CERTIFICADORA PROGRAMAÇÃO ORIENTADA A OBJETOS II FILIPE GONÇALVES ISQUIERDO– 20191302246 RIO DE JANEIRO 2021.1 FILIPE GONÇALVES ISQUIERDO PROGRAMAÇÃO ORIENTADA A OBJETOS II Trabalho apresentado no curso Superior em Sistemas de Informação da Universidade Veiga de Almeida, como requisito para obtenção do certificado de PROGRAMAÇÃO ORIENTADA A OBJETOS II Professor Orientador: MARCO AURELIO NOVAES ESTEVES RIO DE JANEIRO 2021.1 CLASSE ESTACIONAMENTO package estacionamento; /** * * @author isquierdo */ public class Estacionamento { /** * @param args the command line arguments */ public static void main(String[] args) { } } CLASSE APLICATIVO package estacionamento.app; import estacionamento.dao.CarroDAO; import estacionamento.db.AcessoDB; import estacionamento.model.Carro; import java.awt.Font; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.util.ArrayList; import javax.swing.JOptionPane; /** * * @author isquierdo */ public class App extends javax.swing.JFrame { /** * Creates new form App */ private Carro carroSelecionado; private ResultSet rs; private boolean edicao = false; public App() { initComponents(); } /** * 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() { jpPesquisa = new javax.swing.JPanel(); txtPesquisa = new javax.swing.JTextField(); btnPesquisar = new javax.swing.JButton(); txtPlaca = new javax.swing.JTextField(); jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); txtMarca = new javax.swing.JTextField(); txtCor = new javax.swing.JTextField(); jLabel3 = new javax.swing.JLabel(); txtEntrada = new javax.swing.JTextField(); jLabel4 = new javax.swing.JLabel(); txtSaida = new javax.swing.JTextField(); jLabel5 = new javax.swing.JLabel(); btnCadastrar = new javax.swing.JButton(); btnAlterar = new javax.swing.JButton(); btnExcluir = new javax.swing.JButton(); btnListar = new javax.swing.JButton(); jScrollPane1 = new javax.swing.JScrollPane(); listaCarros = new javax.swing.JList<>(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); txtPesquisa.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { txtPesquisaActionPerformed(evt); } }); btnPesquisar.setText("Buscar por placa"); btnPesquisar.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnPesquisarActionPerformed(evt); } }); jLabel1.setText("Placa"); jLabel2.setText("Marca"); jLabel3.setText("Cor"); jLabel4.setText("Entrada"); jLabel5.setText("Saída"); btnCadastrar.setText("cadastrar"); btnCadastrar.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnCadastrarActionPerformed(evt); } }); btnAlterar.setText("Alterar"); btnAlterar.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnAlterarActionPerformed(evt); } }); btnExcluir.setText("Excluir"); btnExcluir.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnExcluirActionPerformed(evt); } }); btnListar.setText("Listar"); btnListar.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnListarActionPerformed(evt); } }); listaCarros.setModel(new javax.swing.AbstractListModel<String>() { String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" }; public int getSize() { return strings.length; } public String getElementAt(int i) { return strings[i]; } }); jScrollPane1.setViewportView(listaCarros); javax.swing.GroupLayout jpPesquisaLayout = new javax.swing.GroupLayout(jpPesquisa); jpPesquisa.setLayout(jpPesquisaLayout); jpPesquisaLayout.setHorizontalGroup( jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jpPesquisaLayout.createSequentialGroup() .addContainerGap() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) .addComponent(txtPlaca, javax.swing.GroupLayout.DEFAULT_SIZE, 80, Short.MAX_VALUE) .addComponent(txtPesquisa)) .addComponent(jLabel1)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(btnPesquisar) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel2) .addComponent(txtMarca, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel3) .addComponent(txtCor, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))))) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel4) .addComponent(txtEntrada, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel5) .addComponent(txtSaida, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))) .addGroup(jpPesquisaLayout.createSequentialGroup() .addComponent(btnCadastrar) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnAlterar).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnExcluir) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnListar)) .addComponent(jScrollPane1)) .addContainerGap(86, Short.MAX_VALUE)) ); jpPesquisaLayout.setVerticalGroup( jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGap(23, 23, 23) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(txtPesquisa, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(btnPesquisar)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addGroup(jpPesquisaLayout.createSequentialGroup() .addComponent(jLabel1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(txtPlaca, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(txtMarca, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) .addComponent(txtCor, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(jLabel2) .addComponent(jLabel3)) .addGap(26, 26, 26))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(txtEntrada, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(txtSaida, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(jpPesquisaLayout.createSequentialGroup() .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(jLabel4) .addComponent(jLabel5)) .addGap(26, 26, 26))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addGroup(jpPesquisaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(btnCadastrar) .addComponent(btnAlterar) .addComponent(btnExcluir) .addComponent(btnListar)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(15, Short.MAX_VALUE)) ); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap() .addComponent(jpPesquisa, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addContainerGap()) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jpPesquisa, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(125, Short.MAX_VALUE)) ); pack(); }// </editor-fold> private void txtPesquisaActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: } private void btnPesquisarActionPerformed(java.awt.event.ActionEvent evt) { try{ CarroDAO carroDAO = new CarroDAO(); this.carroSelecionado = carroDAO.buscarPorPlaca(this.txtPesquisa.getText()); if (this.carroSelecionado == null) { JOptionPane.showMessageDialog(null,"Nenhum carro encontrado!"); return; } this.txtPlaca.setText(this.carroSelecionado.getPlaca()); this.txtMarca.setText(this.carroSelecionado.getMarca()); this.txtCor.setText(this.carroSelecionado.getCor()); this.txtEntrada.setText(this.carroSelecionado.getHoraEntrada().toString()); this.txtSaida.setText(this.carroSelecionado.getHoraSaida().toString()); this.edicao = true; }catch(Exception e){ e.printStackTrace(); JOptionPane.showMessageDialog(null,"Não foi possível buscar o Carro!"); } } private void btnCadastrarActionPerformed(java.awt.event.ActionEvent evt) { Carro carro = new Carro(); CarroDAO dao = new CarroDAO(); carro.setPlaca(txtPlaca.getText()); carro.setMarca(txtMarca.getText()); carro.setCor(txtCor.getText()); carro.setHoraEntrada(Integer.valueOf(txtEntrada.getText())); carro.setHoraSaida(Integer.valueOf(txtSaida.getText())); if (dao.inserir(carro)) { JOptionPane.showMessageDialog(null, "Carro cadastrado!"); } } private void btnAlterarActionPerformed(java.awt.event.ActionEvent evt) { CarroDAO carroDAO = new CarroDAO(); this.carroSelecionado.setPlaca(this.txtPlaca.getText()); this.carroSelecionado.setMarca(this.txtMarca.getText()); this.carroSelecionado.setCor(this.txtCor.getText()); this.carroSelecionado.setHoraEntrada(Integer.parseInt(this.txtEntrada.getText())); this.carroSelecionado.setHoraSaida(Integer.parseInt(this.txtSaida.getText())); if (carroDAO.alterar(this.carroSelecionado)) { JOptionPane.showMessageDialog(null,"Carro alterado com sucesso!"); } } private void btnExcluirActionPerformed(java.awt.event.ActionEvent evt) { CarroDAO dao = new CarroDAO(); if (dao.remover(this.carroSelecionado)) { JOptionPane.showMessageDialog(null,"Carro excluído com sucesso!"); } } private void btnListarActionPerformed(java.awt.event.ActionEvent evt) { String consulta= "select * FROM Carros"; AcessoDB acesso = new AcessoDB(); if (acesso.conectar()) { try{ PreparedStatement stm = acesso.con.prepareStatement(consulta); rs = stm.executeQuery(); if (!rs.next()) { JOptionPane.showMessageDialog(null,"Nenhum carro encontrado!"); } ArrayList<String> ar = new ArrayList<>(); String linha = String.format("%6s|%-10s|%10s|%5s|%5s" ,"placa","marca","cor","Entrada","Saída"); ar.add(linha); while(rs.next()){ linha = String.format("%6s|%-10s|%10s|%5s|%5s", rs.getString("placa") ,rs.getString("marca"),rs.getString("cor"),rs.getString("horaEntrada") ,rs.getString("horaSaida")); ar.add(linha); } String vet[] = new String[ar.size()]; for(int i = 0; i < ar.size(); i++){ vet[i] = ar.get(i); } this.listaCarros.setFont(new Font("Courier New", Font.PLAIN, 11)); this.listaCarros.setListData(vet); this.listaCarros.setSelectedIndex(1); }catch(Exception e){ e.printStackTrace(); JOptionPane.showMessageDialog(null,"Não foi possível listar os carros!"); } } } /** * @param args the command line arguments */ 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(App.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(App.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(App.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(App.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new App().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton btnAlterar; private javax.swing.JButton btnCadastrar; private javax.swing.JButton btnExcluir; private javax.swing.JButton btnListar; private javax.swing.JButton btnPesquisar; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JLabel jLabel5; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JPanel jpPesquisa; private javax.swing.JList<String> listaCarros; private javax.swing.JTextField txtCor; private javax.swing.JTextField txtEntrada; private javax.swing.JTextField txtMarca; private javax.swing.JTextField txtPesquisa; private javax.swing.JTextField txtPlaca; private javax.swing.JTextField txtSaida; // End of variables declaration } CLASSE CARRODAO package estacionamento.dao; import estacionamento.db.AcessoDB; import estacionamento.model.Carro; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement; import javax.swing.JOptionPane; public class CarroDAO { public Carro buscarPorPlaca(String placa){ AcessoDB acesso = new AcessoDB(); Carro carro = new Carro(); ResultSet rs; if (acesso.conectar()) { try{ String consulta = "select * from Carros where placa = '" + placa.trim() + "'"; PreparedStatement stm = acesso.con.prepareStatement(consulta); rs = stm.executeQuery(); if (rs.next()) { if (Integer.parseInt(rs.getString("id")) > 0) { carro.setId(Integer.parseInt(rs.getString("id"))); carro.setPlaca(rs.getString("placa")); carro.setMarca(rs.getString("marca")); carro.setCor(rs.getString("cor")); carro.setHoraEntrada(Integer.parseInt(rs.getString("horaEntrada"))); carro.setHoraSaida(Integer.parseInt(rs.getString("horaSaida"))); } } }catch(Exception e){ JOptionPane.showMessageDialog(null, "Não foi possível busca o Carro."); return null; } } acesso.desconectar(); return carro; } public boolean inserir(Carro carro){ AcessoDB acesso = new AcessoDB(); if (acesso.conectar()) { try{ String consulta = "INSERT into Carros(placa,marca,cor,horaEntrada,horaSaida)" + " VALUES('" + carro.getPlaca() + "','" + carro.getMarca() + "','" + carro.getCor() + "'," + carro.getHoraEntrada() + "," + carro.getHoraSaida() + ")"; Statement st = acesso.con.createStatement(); st.executeUpdate(consulta); }catch(Exception e){ JOptionPane.showMessageDialog(null, "Carro não incluído."); return false; } } acesso.desconectar(); return true; } public boolean alterar(Carro carro){ AcessoDB acesso = new AcessoDB(); if (acesso.conectar()) { try{ String consulta = "UPDATE Carros SET placa='" +carro.getPlaca()+ "', marca='" + carro.getMarca() + "', cor ='"+ carro.getCor()+ "',horaEntrada=" + carro.getHoraEntrada() + ", horaSaida=" + carro.getHoraSaida()+ " WHERE id = " + carro.getId()+ ""; Statement st = acesso.con.createStatement(); st.executeUpdate(consulta); }catch(Exception e){ e.printStackTrace(); JOptionPane.showMessageDialog(null, "Carro não alterado."); return false; } } acesso.desconectar(); return true; } public boolean remover(Carro carro){ AcessoDB acesso = new AcessoDB(); if (acesso.conectar()) { try{ String consulta = "DELETE FROM Carros WHERE id =" + carro.getId(); Statement st = acesso.con.createStatement(); st.executeUpdate(consulta); }catch(Exception e){ e.printStackTrace(); JOptionPane.showMessageDialog(null, "Carro não excluído!"); } } acesso.desconectar(); returntrue; } public boolean listar(){ AcessoDB acesso = new AcessoDB(); Carro carro = new Carro(); ResultSet rs; if (acesso.conectar()) { try{ String consulta = "SELECT * FROM Carros"; PreparedStatement stm = acesso.con.prepareStatement(consulta); rs = stm.executeQuery(); String linha = String.format("%3s|%-15s|%10s|%10s|%10s", "placa", "marca","cor", "Entrada", "SaÃda"); System.out.println(linha); while(rs.next()){ if (Integer.parseInt(rs.getString("placa")) > 0) { carro.setPlaca(rs.getString("placa")); carro.setMarca(rs.getString("marca")); carro.setCor(rs.getString("cor")); carro.setHoraEntrada(Integer.parseInt(rs.getString("horaEntrada"))); carro.setHoraSaida(Integer.parseInt(rs.getString("horaSaida"))); linha = String.format("%3s|%-15s|%10s|%10s|%10s", carro.getPlaca(), carro.getMarca(), carro.getCor(), carro.getHoraEntrada().toString(), carro.getHoraSaida().toString()); System.out.println(linha); } } rs = stm.executeQuery(); }catch(Exception e){ e.printStackTrace(); System.out.println("Lista não gerada"); return false; } } acesso.desconectar(); return true; } } CLASSE ACESSODB package estacionamento.db; import java.io.File; import java.sql.Connection; import java.sql.DriverManager; import javax.swing.JOptionPane; public class AcessoDB { public Connection con; private static final String ARQUIVO_BANCO = "carrosDB.accdb"; private static final String BANCO = "jdbc:ucanaccess://" + ARQUIVO_BANCO ; public boolean conectar(){ try{ File arquivoBanco = new File(ARQUIVO_BANCO); if (!arquivoBanco.exists()) { JOptionPane.showMessageDialog(null, "Arquivo de banco não encontrado."); } con = DriverManager.getConnection(BANCO); } catch(Exception e){ JOptionPane.showMessageDialog(null, e.getMessage()); return false; } return true; } public boolean desconectar(){ con = null; if(con == null){ return true; } return false; } } CLASSE CARRO package estacionamento.model; public class Carro { private Integer id; private String placa, marca, cor; private Integer horaEntrada, horaSaida; public Carro() { } public Carro(Integer id) { this.id = id; } public Carro(String placa) { this.placa = placa; } public Carro(Integer horaEntrada, Integer horaSaida) { this.horaEntrada = horaEntrada; this.horaSaida = horaSaida; } public Carro(String placa, String marca, String cor, Integer id, Integer horaEntrada, Integer horaSaida) { this.placa = placa; this.marca = marca; this.cor = cor; this.id = id; this.horaEntrada = horaEntrada; this.horaSaida = horaSaida; } public String getPlaca() { return placa; } public void setPlaca(String placa) { this.placa = placa; } public String getMarca() { return marca; } public void setMarca(String marca) { this.marca = marca; } public String getCor() { return cor; } public void setCor(String cor) { this.cor = cor; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public Integer getHoraEntrada() { return horaEntrada; } public void setHoraEntrada(Integer horaEntrada) { this.horaEntrada = horaEntrada; } public Integer getHoraSaida() { return horaSaida; } public void setHoraSaida(Integer horaSaida) { this.horaSaida = horaSaida; } } CAPTURA DE TELA COM OS TESTES Teste 1: Teste 2: Bibliografia · Curso em Vídeo: POO JAVA · Netbeans · EBOOK Disciplina POO2
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