Pessoal, estou fazendo um trabalhoa acadeico e preciso de ajuda!!!
No meu caso é o seguinte o uso do " dispose() "
gera um erro na linha e não deixa salvar nem rodar
package com.opet.tsi.locadora;
import java.awt.;
import java.awt.event.;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Arrays;
import javax.swing.;
import javax.swing.event.;
import org.omg.SendingContext.RunTime;
import java.sql.*;
public class TelaLogin extends JDialog {
private JButton btn_Ok;
private JButton btn_Cancela;
private JButton btn_Ajuda;
private JLabel jcomp4;
private JTextField txt_usuario;
private JLabel jcomp6;
private JPasswordField jcomp7;
protected Connection abre_mysql () throws Exception {
try {
// verifica e cria o link com o driver JDBC do mysql
Class.forName ("org.gjt.mm.mysql.Driver");
// Passa a con
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/test","root","");
return con;
} catch ( java.sql.SQLException e ) {
System.out.println("A conexao foi recusada.");
throw ( e );
}
}
public TelaLogin() {
super((JFrame)null,true);
//super("Login", true, true, true);
JPanel panel = new JPanel(new GridLayout(3, 1));
//construct components
btn_Ok = new JButton ("Ok");
btn_Cancela = new JButton ("Cancela");
btn_Ajuda = new JButton ("Ajuda");
jcomp4 = new JLabel ("Usuário");
txt_usuario = new JTextField (20);
jcomp6 = new JLabel ("Senha");
jcomp7 = new JPasswordField (20);
//adjust size and set layout
setSize (400, 300);
setLayout (null);
//add components
add (btn_Ok);
add (btn_Cancela);
add (btn_Ajuda);
add (jcomp4);
add (txt_usuario);
add (jcomp6);
add (jcomp7);
//set component bounds (only needed by Absolute Positioning)
btn_Ok.setBounds (65, 155, 100, 20);
btn_Cancela.setBounds (210, 155, 100, 20);
btn_Ajuda.setBounds (115, 200, 140, 20);
jcomp4.setBounds (45, 45, 60, 25);
txt_usuario.setBounds (105, 50, 160, 25);
jcomp6.setBounds (45, 100, 50, 25);
jcomp7.setBounds (105, 95, 160, 25);
btn_Ok.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
{
TelaLogin();
dispose();
}
try {
efetualogin();
boolean isCorrect = true;
} catch (Exception e1) {
boolean isCorrect = false;
System.out.println("ERRO");
e1.printStackTrace();
}
}
});
btn_Cancela.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
cancelalogin();
}
});
}
protected void cancelalogin() {
// TODO Auto-generated method stub
if(txt_usuario.getText().equals("")&& jcomp7.getPassword().equals("")){
int result = JOptionPane.showConfirmDialog(this, "HAHAHA", "HAHAHA", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
}
else {
int result = JOptionPane.showConfirmDialog(this, "Cancelamento", "Confirma", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
if(result == JOptionPane.YES_OPTION){
System.out.println("yes");
txt_usuario.setText("");
jcomp7.setText("");
} else{
System.out.println("no");
}
}
}
protected void efetualogin() throws Exception
{
try {
Connection con = abre_mysql();
Statement s = con.createStatement ();
Statement stm = con.createStatement();
ResultSet rs = stm.executeQuery("SELECT Usuario, senha FROM login WHERE " +
"Usuario='"+txt_usuario.getText()+"' AND senha ='"+jcomp7.getPassword()+"'");
if (rs.next())
{
TelaLogin.dispose();
}
rs.close();
con.close();
}
catch (ClassNotFoundException e)
{
JOptionPane.showMessageDialog(null, "Falha na conexão com o banco de dados.\n" + e.getMessage());
e.printStackTrace();
}
catch (SQLException e)
{
JOptionPane.showMessageDialog(null, "Login Incorreto.\n" + e.getMessage() +
"Tente novamente.\n","Mensagem do Programa", JOptionPane.ERROR_MESSAGE);
e.printStackTrace();
}
}
/*public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
JOptionPane.showMessageDialog(this, "Chegou.");
if (btn_Ok.equals(cmd)) { //Process the password.
char[] input = jcomp7.getPassword();
if (isPasswordCorrect(input)) {
JOptionPane.showMessageDialog(this, "Logado com Sucesso.");
}
else {
JOptionPane.showMessageDialog(this, "Senha ou Usuário incorreto");
}
// Zero out the possible password, for security.
Arrays.fill(input, '0');
jcomp7.selectAll();
resetFocus();
}
protected void resetFocus() {
jcomp7.requestFocusInWindow();
}
public static void main (String[] args) {
JFrame frame = new JFrame ("TelaLogin");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add (new TelaLogin());
frame.pack();
frame.setVisible (true);
}
}
