Olá! Fiz um programa em Java no NetBeans para receber os dados e as notas de alunos. Inicialmente o objeto aluno era inserido em um ArrayList, até aí tudo bem. Em seguida eu modifiquei o código para que os alunos fossem inseridos no banco de dados, pelo método que criei.
Estou usando fazendo o programa de acordo com o exemplo que tenho na apostila da faculdade. O problema é que quando eu vou confirmar a inserção do aluno no bando de dados aparece uma mensagem com o seguinte erro: "error loading driver.java.sql.SQLNon Transient Connection: java.net.ConnectException: Erro ao conectar no servidor 'localhost' porta '1527'. Recebida a mensagem: 'Connection refused: connect' " ...Tem outro problema também: Antes de modificar o código, o aluno era inserido e em seguida, após fechar a tela, era aberta outra tela com os alunos inseridos e a média final de cada aluno. Agora essa segunda janela também não é aberta mais.
Se alguém puder me ajudar...Desde já, muito obrigada!
Segue o código:
Meu código tem 3 classes...
Aluno:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pacoteInterface;
/**
*
* @author Giseli
*/
public class Aluno {
private String nome;
private String matricula;
private double prova1;
private double prova2;
private double trabalhos;
private double provafinal;
Aluno(String n, String m, double p1, double p2, double t){
this.nome = n;
this.matricula = m;
this.prova1 = p1;
this.prova2 = p2;
this.trabalhos = t;
this.provafinal = 0; //Inicializando a nota com zero.
}
Aluno(String nome, String matricula, double nota1, double nota2, double nota3, double provafinal) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
double media() {
double m = this.getProva1() +
this.getProva2() +
this.getTrabalhos();
if (m < 60){
m = (40*m + 60*this.getProvaFinal())/100;
}
return m;
}
/**
* @return the nome
*/
public String getNome() {
return nome;
}
/**
* @param nome the nome to set
*/
public void setNome(String nome) {
this.nome = nome;
}
/**
* @return the matricula
*/
public String getMatricula() {
return matricula;
}
/**
* @param matricula the matricula to set
*/
public void setMatricula(String matricula) {
this.matricula = matricula;
}
/**
* @return the prova1
*/
public double getProva1() {
return prova1;
}
/**
* @param prova1 the prova1 to set
*/
public void setProva1(double prova1) {
this.prova1 = prova1;
}
/**
* @return the prova2
*/
public double getProva2() {
return prova2;
}
/**
* @param prova2 the prova2 to set
*/
public void setProva2(double prova2) {
this.prova2 = prova2;
}
/**
* @return the trabalhos
*/
public double getTrabalhos() {
return trabalhos;
}
/**
* @param trabalhos the trabalhos to set
*/
public void setTrabalhos(double trabalhos) {
this.trabalhos = trabalhos;
}
/**
* @return the provaFinal
*/
public double getProvaFinal() {
return provafinal;
}
/**
* @param provaFinal the provaFinal to set
*/
public void setProvaFinal(double provaFinal) {
this.provafinal = provaFinal;
}
}
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pacoteInterface;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
/**
*
* @author Giseli
*/
public class ListaAlunos extends javax.swing.JFrame {
/**
* Creates new form ListaAlunoss
*/
// public ListaAlunos() {
//ERA ASSIM:
public ListaAlunos( ) {
initComponents();
this.alunos = alunos; //Inicializando o objeto alunos //ANTES ERA SSIM
//alunos = consultarAlunosBD(); //Inicializando o objeto alunos
for (Aluno a: alunos) {
this.jComboBox1.addItem(a.getNome());
}
}
ArrayList<Aluno> alunos; //DEVE MUDAR DE LUGAR
private void consultarAlunosBD(){
String driver = "org.apache.derby.jdbc.ClientDriver";
String url = "jdbc:derby://localhost:1527/LP";
String username = "giseli";
String password = "giseli";
//Criando um ArrayList para armazenar os dados:
ArrayList<Aluno> alunosBD = new ArrayList<Aluno>();
try{
Class.forName(driver);
Connection connection = DriverManager.getConnection(
url, username, password);
Statement statement = connection.createStatement();
String consulta = "SELECT * FROM Aluno";
statement.executeQuery(consulta);
ResultSet results = statement.executeQuery(consulta);
while (results.next()){
String nome = results.getString("nome");
String matricula = results.getString("matricula");
double nota1 = results.getDouble("nota1");
double nota2 = results.getDouble("nota2");
double nota3 = results.getDouble("nota3");
double provafinal = results.getDouble("provafinal");
Aluno a = new Aluno(nome, matricula,
nota1, nota2, nota3, provafinal);
alunosBD.add(a);
}
connection.close();
}catch(ClassNotFoundException cnfe){
Interface.mensagemErro("Error loading driver: " + cnfe, "ERRO");
}catch(SQLException sqle){
Interface.mensagemErro("Error loading driver: " + sqle, "ERRO");
}
}
/**
* 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() {
jLabel1 = new javax.swing.JLabel();
jComboBox1 = new javax.swing.JComboBox();
jLabel2 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("Alunos Incluídos:");
jComboBox1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jComboBox1ActionPerformed(evt);
}
});
jLabel2.setText("Média do aluno:");
jButton1.setText("Fechar");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
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()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 194, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 65, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 101, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 101, Short.MAX_VALUE)
.addComponent(jTextField1))
.addGap(30, 30, 30))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(21, 21, 21)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jComboBox1, javax.swing.GroupLayout.DEFAULT_SIZE, 29, Short.MAX_VALUE)
.addComponent(jTextField1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(175, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
//CÓDIGO QUE ESTÁ GERANDO ERRO:
int posicao = this.jComboBox1.getSelectedIndex();
Aluno a = this.alunos.get(posicao);
String media = Double.toString(a.media());
this.jTextField1.setText(media);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.exit(1);
}
/**
* @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(ListaAlunos.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ListaAlunos.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ListaAlunos.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ListaAlunos.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() {
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JComboBox jComboBox1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pacoteInterface;
import java.util.ArrayList;
import java.sql.*;
/**
*
* @author Giseli
*/
public class Interface extends javax.swing.JFrame {
/**
* Creates new form
*/
private final ArrayList<Aluno> alunos ; //NÃO TINHA "final"
//ArrayList<Aluno> alunos = new ArrayList<Aluno>(); //Pra teste
public Interface() { //Construtor da Classe
/*this.alunos = new ArrayList<Aluno>();*/
this.alunos = new ArrayList<>(); //ERA ASSIM: new ArrayList<Aluno>();
initComponents();
}
/* void incluirAluno (Aluno a) {
this.alunos.add(a);
}*/
public void mostraAluno(int i){ // teste
System.out.println("Nome:"+alunos.get(i).getNome());
}
/*public ArrayList<Aluno> getAlunos() { //ISSO NÃO TINHA
return alunos;
}*/
/**
* 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() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jPanel2 = new javax.swing.JPanel();
jLabel3 = new javax.swing.JLabel();
jTextField3 = new javax.swing.JTextField();
jLabel4 = new javax.swing.JLabel();
jTextField4 = new javax.swing.JTextField();
jLabel5 = new javax.swing.JLabel();
jTextField5 = new javax.swing.JTextField();
jCheckBox1 = new javax.swing.JCheckBox();
jTextField6 = new javax.swing.JTextField();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Dados pessoais do aluno", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Agency FB", 1, 12))); // NOI18N
jLabel1.setText("Nome do aluno");
jLabel2.setText("Matrícula");
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(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()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 229, Short.MAX_VALUE)
.addComponent(jTextField2))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 1<img src="http://javafree.uol.com.br/forum/images/smiles/icon_cool.gif">
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(43, Short.MAX_VALUE))
);
jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Notas do aluno", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Agency FB", 1, 12))); // NOI18N
jLabel3.setText("Primeira prova");
jLabel4.setText("Segunda prova");
jLabel5.setText("Ecercicios");
jTextField5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField5ActionPerformed(evt);
}
});
jCheckBox1.setText("Prova final");
jCheckBox1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jCheckBox1ActionPerformed(evt);
}
});
jTextField6.setEditable(false);
jTextField6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField6ActionPerformed(evt);
}
});
jButton2.setText("Adicionar este aluno");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("Fechar");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(47, 47, 47)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jButton2)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
.addComponent(jLabel5)
.addGap(45, 45, 45)))
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jTextField5, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE)
.addComponent(jTextField3, javax.swing.GroupLayout.Alignment.LEADING))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton3)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(79, 79, 79)
.addComponent(jCheckBox1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
.addComponent(jLabel4)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(51, 51, 51)))
.addContainerGap())
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(17, 17, 17)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField3, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4)))
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(18, 18, 1<img src="http://javafree.uol.com.br/forum/images/smiles/icon_cool.gif">
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(jTextField5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(35, 35, 35)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jCheckBox1)
.addComponent(jTextField6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 26, Short.MAX_VALUE)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton2)
.addComponent(jButton3))
.addGap(51, 51, 51))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(33, 33, 33)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 458, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(179, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 54, Short.MAX_VALUE)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
pack();
}// </editor-fold>
public void limparCampos() { //Isso era provate
this.jTextField1.setText("");//O nome volta a ser vazio
this.jTextField2.setText("");//A matricula tambem
this.jTextField3.setText("0");//As notas voltam a ser zero
this.jTextField4.setText("0");
this.jTextField5.setText("0");
this.jTextField6.setText("0");
this.jCheckBox1.setSelected(false); /*O campo de seleção da prova final
não estará selecionado*/
this.jTextField6.setEditable(false);/*A princípio, o campo com a nota da
prova fnal não poderá ser inserido*/
}
private void inserirAlunoBD(Aluno a) {
//Definindo o driver do banco que será utilizado:
String driver = "org.apache.derby.jdbc.ClientDriver";
//Definindo o Banco de dados que será utilizado:
String url = "jdbc:derby://localhost:1527/LP";
//Definindo o usuário e a senha para conectarmos ao banco:
String username = "giseli";
String password = "giseli";
try {
//Carregando driver do BD:
Class.forName(driver);
//Estabelecendo conexão com o BD
Connection connection = DriverManager.getConnection(
url, username, password);
//Criando statement para executar queries.
Statement statement = connection.createStatement();
/* o código para manipular o banco vem a partir daqui. Através do
"statement" criado acima, podemos inserir dados nas tabelas, recuperar dados etc.
Neste caso, iremos atualizar a tabela Aluno inserindo um anova linha.
*/
String insert = "INSERT INTO Aluno VALUES ('" +
a.getNome() + "', '" + a.getMatricula() + "', " +
a.getProva1() + ", " + a.getProva2() + ", " +
a.getTrabalhos() + ", " + a.getProvaFinal() + ")";
/*A string criada é como o comando SQL a seguir: INSERT INTO Alunos
Values ('Hilário', '12345', 20.0, 30.0, 10.0, 0.0)*/
statement.executeUpdate(insert);
connection.close();
}catch(ClassNotFoundException cnfe){
mensagemErro("Error loading driver: " + cnfe, "ERRO");
}catch(SQLException sqle) {
mensagemErro("Error loading driver: " + sqle, "ERRO");
}
}
private void jCheckBox1ActionPerformed(java.awt.event.ActionEvent evt) {
boolean estado = this.jTextField6.isEditable();
this.jTextField6.setEditable(!estado); // TODO add your handling code here:
}
private void jTextField5ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField6ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String nome, matricula;
double nota1 = 0, nota2 = 0, nota3 = 0, provafinal = 0;
//Recuperando os campos digitados:
nome = this.jTextField1.getText();
matricula = this.jTextField2.getText();
try {
//Transformando as notas digitadas para Double:
nota1 = Double.parseDouble(this.jTextField3.getText());
nota2 = Double.parseDouble(this.jTextField4.getText());
nota3 = Double.parseDouble(this.jTextField5.getText());
//Criando um objeto da classe Aluno:
Aluno a = new Aluno(nome, matricula, nota1, nota2, nota3);
/* getAlunos().add(a);*/ //ISSO NÃO TINHA
//Verificando se aluno fez prova final:
if (this.jTextField6.isEditable()) {
provafinal = Double.parseDouble(this.jTextField6.getText());
a.setProvaFinal(provafinal);
}
//Confirmando se os dados inseridos estão corretos
String mensagem = "Confira os dados do Aluno e confirme se deseja "
+ "adicioná-lo: \n\n";
mensagem += "Nome: "+ nome + "\n";
mensagem += "Matricula: "+ matricula + "\n";
mensagem += "Primeira Prova: "+ nota1 + "\n";
mensagem += "Segunda Prova: "+ nota2 + "\n";
mensagem += "Exercícios: "+ nota3 + "\n";
mensagem += "Média Final: "+ a.media();
//Inserindo a nota da prova final na mensagem
if(this.jTextField6.isEditable()){
mensagem += "Prova Final: " + provafinal + "\n";
}
/*Criando uma janela de CONFIRMAÇÃO com as opções ON e CANCEL,
e verificando se o usuário escolheu a opção OK */
if(confirmacao(mensagem, "Aluno inserido")) {
//Incluindo o aluno no ArrayList...
inserirAlunoBD(a); //ERA ASSIM: incluirAluno(a);
//Avisando que ele foi inserido...
mensagemAlerta("Aluno inserido com sucesso.",
"Aluno inserido!");
//...e limpando os campos do formulário..
this.limparCampos();
}
inserirAlunoBD(a); //Incluindo o aluno no ArrayList
} catch (NumberFormatException numberFormatException) {
mensagemErro(
"Erro: alguma nota não foi digitada corretamente.",
"Nota inválida");
}
this.limparCampos(); /*Limpando todos os campos para que o usuário possa
cadastrar um novo aluno*/
}
//MÉTODOS INSERIDOS PARA MENSAGENS
public static void mensagemErro(String msg, String titulo){
//Mostrando uma mensagem de erro ao usuário
javax.swing.JOptionPane.showMessageDialog(null, msg, titulo,
javax.swing.JOptionPane.ERROR_MESSAGE);
}
public static boolean confirmacao (String msg, String titulo) {
/*Criando uma janela de CONFIRMAÇÃO com as opções OK e CANCEL, e retornando
verdadeiro se o usuario clicou em OK
*/
if(javax.swing.JOptionPane.showConfirmDialog
(null, msg, titulo,
javax.swing.JOptionPane.OK_CANCEL_OPTION) ==
javax.swing.JOptionPane.OK_OPTION)
{
return true;
}
else {
return false;
}
}
public static void mensagemAlerta (String msg, String titulo){
//Mostrando uma informação ao usuário
javax.swing.JOptionPane.showMessageDialog(null, msg, titulo,
javax.swing.JOptionPane.INFORMATION_MESSAGE);
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
setVisible(true);
this.dispose();
/*this.setVisible(false);*/ //ERA ISSO NA LINHA ANTERIOR
}
/**
* @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(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Interface.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 Interface().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JCheckBox jCheckBox1;
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.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
private javax.swing.JTextField jTextField5;
private javax.swing.JTextField jTextField6;
// End of variables declaration
}