Olá, criei um projeto simples de cadastro em banco de dados (Postgresql) com uma tela de login sendo a tela inicial, porem quando eu mando limpar e executar ele cria o arquivo .jar na pasta porem quando eu clico ele não executa e nem faz nada … alguém poderia me ajudar ??
OBS: Minha classe marcada como principal é o formulário Jframe (o formulário de login).
Provavelmente você não está exportando alguma dependência junto (ou não copia a pasta com as dependências que o nb cria).
Mas, uma forma de ver o erro é executar via prompt de comando/terminal
java -jar NOME_DO_TEU_JAR.jarRecebi o seguinte resultado :
C:\Users\felipe.schmidt\Documents\NetBeansProjects\ControleMensal\store> java -jar ControleMensal.jar
Exception in thread “main” java.lang.NullPointerException
at javax.swing.ImageIcon.(Unknown Source)
at controlemensal.Login.initComponents(Login.java:90)
at controlemensal.Login.(Login.java:27)
at controlemensal.Main.main(Main.java:19)
PS C:\Users\felipe.schmidt\Documents\NetBeansProjects\ControleMensal\store>
O que tem na linha 90 da classe Login?
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/img/icons8-usuário-64.png")));
Ou jLabel3 está nulo ou não encontra a imagem referida.
A imagem esta na pasta mas eu não sei ver se a jlabel3 esta nula pois ela aparece no meu projeto
Uma outra coisa engraçada é essa parte:
não existe essa classe no meu projeto.
Não existe uma classe chamada Main dentro do package controlemensal?
Não , são só essas classes.
Refiz esse teste e me devolveu assim:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at sun.awt.SunToolkit.getImageFromHash(Unknown Source)
at sun.awt.SunToolkit.getImage(Unknown Source)
at controlemensal.Login.setIcon(Login.java:35)
at controlemensal.Login.<init>(Login.java:30)
at controlemensal.Login.lambda$main$0(Login.java:310)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)Não é um teste, é a maneira de executar usando prompt.
E o que tem na linha 35? Posta a classe toda e indica o que tem na linha 35
Linha 35 /
private void setIcon() {
setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("../img/icofav.png")));
}
package controlemensal;
import Entidades.conectabd;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.sql.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
public class Login extends javax.swing.JFrame {
Connection con;
PreparedStatement pst;
ResultSet rs;
public Login() throws ClassNotFoundException {
initComponents();
con = conectabd.conectadb();
jTextField1.requestFocus();
setIcon();
}
private void setIcon() {
setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("../img/icofav.png")));
}
public void log() throws ClassNotFoundException{
String sql = "select * from login where usuario = ? and senha = ?";
try {
pst = con.prepareStatement(sql);
pst.setString(1,jTextField1.getText());
pst.setString(2,jPasswordField1.getText());
rs = pst.executeQuery();
if(rs.next()){
PreHome n = new PreHome();
n.setVisible(true);
this.dispose();
}
else{
JOptionPane.showMessageDialog(null,"Usuario Invalido");
}
} catch (SQLException erro) {
JOptionPane.showMessageDialog(null,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();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jPasswordField1 = new javax.swing.JPasswordField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel1.setText("jLabel1");
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setUndecorated(true);
jLabel2.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jLabel2.setText("Efetue o Login");
jLabel3.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/img/icons8-usuário-64.png"))); // NOI18N
jLabel3.setText("Usuario");
jLabel4.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jLabel4.setIcon(new javax.swing.ImageIcon(getClass().getResource("/img/icons8-senha-64.png"))); // NOI18N
jLabel4.setText("Senha");
jTextField1.setToolTipText("Digite o seu Usuario");
jTextField1.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(java.awt.event.FocusEvent evt) {
jTextField1FocusGained(evt);
}
public void focusLost(java.awt.event.FocusEvent evt) {
jTextField1FocusLost(evt);
}
});
jTextField1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyTyped(java.awt.event.KeyEvent evt) {
jTextField1KeyTyped(evt);
}
});
jPasswordField1.setToolTipText("Digite sua Senha");
jPasswordField1.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusLost(java.awt.event.FocusEvent evt) {
jPasswordField1FocusLost(evt);
}
});
jPasswordField1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
jPasswordField1KeyPressed(evt);
}
public void keyTyped(java.awt.event.KeyEvent evt) {
jPasswordField1KeyTyped(evt);
}
});
jButton1.setBackground(new java.awt.Color(0, 153, 0));
jButton1.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jButton1.setForeground(new java.awt.Color(255, 255, 255));
jButton1.setText("Login");
jButton1.setEnabled(false);
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("X");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(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(170, Short.MAX_VALUE)
.addComponent(jLabel2)
.addGap(129, 129, 129))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jButton2))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3)
.addComponent(jLabel4))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField1)
.addComponent(jPasswordField1))))
.addGap(28, 28, 28))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton2)
.addGap(10, 10, 10)
.addComponent(jLabel2)
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)
.addContainerGap(23, Short.MAX_VALUE))
);
setSize(new java.awt.Dimension(414, 288));
setLocationRelativeTo(null);
}// </editor-fold>
private void jPasswordField1FocusLost(java.awt.event.FocusEvent evt) {
if (jPasswordField1.getText().equals("")){
jLabel4.setForeground(new java.awt.Color(255, 0, 0));
jButton1.setEnabled(false);
}
else
if(!jPasswordField1.getText().equals("")){
jButton1.setEnabled(true);
}
else{
}
}
private void jPasswordField1KeyTyped(java.awt.event.KeyEvent evt) {
//jButton1.setEnabled(true);
jLabel4.setForeground(new java.awt.Color(0, 0, 0));
if(jTextField1.getText().equals("Usuario não pode ser em branco") || jTextField1.getText().equals("")){
jButton1.setEnabled(false);
jTextField1.setText("Usuario não pode ser em branco");
jTextField1.setForeground(new java.awt.Color(255, 0, 0));
jLabel3.setForeground(new java.awt.Color(255, 0, 0));
}
else{jButton1.setEnabled(true);}
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try {
log();
} catch (ClassNotFoundException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void jTextField1FocusLost(java.awt.event.FocusEvent evt) {
if (jTextField1.getText().equals("")){
jButton1.setEnabled(false);
jTextField1.setText("Usuario não pode ser em branco");
jTextField1.setForeground(new java.awt.Color(255, 0, 0));
jLabel3.setForeground(new java.awt.Color(255, 0, 0));
}
else
if(jTextField1.getText().equals("Usuario não pode ser em branco")){
jTextField1.setText("");
jButton1.setEnabled(false);
}
else{
}
}
private void jTextField1FocusGained(java.awt.event.FocusEvent evt) {
if(jTextField1.getText().equals("Usuario não pode ser em branco")){
jTextField1.setText("");
}
else{
}
}
private void jTextField1KeyTyped(java.awt.event.KeyEvent evt) {
jTextField1.setForeground(new java.awt.Color(0, 0, 0));
jLabel3.setForeground(new java.awt.Color(0, 0, 0));
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}
private void jPasswordField1KeyPressed(java.awt.event.KeyEvent evt) {
if(evt.getKeyCode()==KeyEvent.VK_ENTER){
try {
log();
} catch (ClassNotFoundException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
/**
* @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(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(() -> {
try {
new Login().setVisible(true);
} catch (ClassNotFoundException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
Resolvido o erro , era simplesmente o caminho que não estava encontrando , resolvi colocando a imagem no pacote principal do programa e funcionou perfeitamente