Hey, ich bin dabei ein Loginfenster zu Bauen, aber irgendwie bekomme ich das einfach nicht zum
laufen. Leider kann ich den Fehler aber einfach nicht finden. Dachte erst das es an der Datenbank abfrage liegt, habe diese daher auch mal verändert, aber der Fehler bleibt vorhanden.
Würde mich über die ein oder andere Idee oder gedankenstütze freuen.
Programm:
[JAVA=19]
public class Login extends JDialog{
public JTextField nameInput = new JTextField("");
public JPasswordField passwordInput = new JPasswordField("");
public void search(String name, String password){
ResultSet a= gcf.getDB().executeQuery("SELECT * FROM customer");
try{
a.next();
//Prüfen ob daten I.O. -> Hauptfenster erzeugen
} catch (Exception e) {
}
}
public Login(){
setLayout(null);
setResizable(false);
setModalityType(ModalityType.APPLICATION_MODAL);
setSize(400,250);
setLocationRelativeTo(null);
ImageIcon icon;
icon = new ImageIcon("../images/icon.png");
setIconImage(icon.getImage());
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
ImageIcon logo = null;
logo = new ImageIcon("../images/logo.png");
JLabel logolabel = new JLabel(logo);
logolabel.setBounds( 0, 0,400,80);
JButton ok = new JButton( "OK" );
ok.setBounds( 160, 160, 60,20);
ok.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
search(nameInput.getText(),new String(passwordInput.getPassword()));
//new MainFrame();//setVisible(false);
}
});
JButton done = new JButton( "Abbruch" );
done.setBounds( 240, 160, 100,20);
done.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
System.exit( 0 );
}
});
JLabel nameText = new JLabel("Benutzer:");
nameText.setBounds( 80, 100, 60,20);
JLabel passwordText = new JLabel("Passwort:");
passwordText.setBounds( 80, 130, 60,20);
nameInput.setBounds( 160, 100, 180,20);
passwordInput.setBounds( 160, 130, 180,20);
add(logolabel);
add(nameText);
add(this.nameInput);
add(passwordText);
add(this.passwordInput);
add(ok);
add(done);
setVisible(true);
}
}
[/code]
Fehlerausgabe:
laufen. Leider kann ich den Fehler aber einfach nicht finden. Dachte erst das es an der Datenbank abfrage liegt, habe diese daher auch mal verändert, aber der Fehler bleibt vorhanden.
Würde mich über die ein oder andere Idee oder gedankenstütze freuen.
Programm:
[JAVA=19]
public class Login extends JDialog{
public JTextField nameInput = new JTextField("");
public JPasswordField passwordInput = new JPasswordField("");
public void search(String name, String password){
ResultSet a= gcf.getDB().executeQuery("SELECT * FROM customer");
try{
a.next();
//Prüfen ob daten I.O. -> Hauptfenster erzeugen
} catch (Exception e) {
}
}
public Login(){
setLayout(null);
setResizable(false);
setModalityType(ModalityType.APPLICATION_MODAL);
setSize(400,250);
setLocationRelativeTo(null);
ImageIcon icon;
icon = new ImageIcon("../images/icon.png");
setIconImage(icon.getImage());
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
ImageIcon logo = null;
logo = new ImageIcon("../images/logo.png");
JLabel logolabel = new JLabel(logo);
logolabel.setBounds( 0, 0,400,80);
JButton ok = new JButton( "OK" );
ok.setBounds( 160, 160, 60,20);
ok.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
search(nameInput.getText(),new String(passwordInput.getPassword()));
//new MainFrame();//setVisible(false);
}
});
JButton done = new JButton( "Abbruch" );
done.setBounds( 240, 160, 100,20);
done.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
System.exit( 0 );
}
});
JLabel nameText = new JLabel("Benutzer:");
nameText.setBounds( 80, 100, 60,20);
JLabel passwordText = new JLabel("Passwort:");
passwordText.setBounds( 80, 130, 60,20);
nameInput.setBounds( 160, 100, 180,20);
passwordInput.setBounds( 160, 130, 180,20);
add(logolabel);
add(nameText);
add(this.nameInput);
add(passwordText);
add(this.passwordInput);
add(ok);
add(done);
setVisible(true);
}
}
[/code]
Fehlerausgabe:
Code:
Exception occurred during event dispatching:
java.lang.NullPointerException
at getpoint.Login.search(Login.java:27)
at getpoint.Login$2.actionPerformed(Login.java:64)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.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.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.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)
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