-1
I need to open a file txt and store his information in a ArrayList and then make a comparison between what was typed and what is in bad ArrayList to see if the login is right or not.
Just follow my code:
public void actionPerformed(ActionEvent evento)
{
if( evento.getSource( ) == bENTRAR )
{
openFile();
//Gravando records = new Gravando();
int i = 0;
System.out.println(grava.getListaMateria().size());
while( i <= grava.getListaMateria().size())
{
System.out.println(grava.getListaMateria().get(2).getLogin());
if(grava.getListaMateria().get(i).getLogin().equals(l) && grava.getListaMateria().get(i).getSenha().equals(s))
{
JOptionPane.showMessageDialog(null,"Login feito com sucesso","Bem vindo",1);
dispose();
MenuGUI oples = new MenuGUI();
}
System.out.println(grava2.getListaMateria().get(i).getLogin()+"\n"+grava2.getListaMateria().get(i).getSenha());
i++;
}
JOptionPane.showMessageDialog(null,"Login ou senha incorretos","Desculpe",1);
}
}
public void openFile()
{
l = tLogin.getText();
s = Senha.getText();
try
{
input = new Scanner(new File( "login.txt" ));
} // end try
catch( FileNotFoundException fileNotFoundException )
{
System.err.println( "Error opening file." );
System.exit( 1 );
} // end catch
ArrayList<Gravando> lp = new ArrayList<Gravando>();
try // read records from file using Scanner object
{
while(input.hasNext())
{
grava.setLogin( input.next() ); // read account number
grava.setSenha( input.next() ); // read first name
lp.add(grava);
} // end try
}
catch ( NoSuchElementException elementException )
{
System.err.println( "File improperly formed." );
input.close();
System.exit( 1 );
} // end catch
catch ( IllegalStateException stateException )
{
System.err.println( "Error reading from file." );
System.exit( 1 );
} // end catch
grava.setListaMaterias(lp);
input.close();
} // end method openFile
But when I spin it makes the mistake:
Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at LoginGUI.actionPerformed(LoginGUI.java:309)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6535)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
.
Can you add the full stack of the error? This error is related to accessing non-existent indices in an array or array.
– user28595
Of course, I edited my question and added the full error @diegofm
– MarcosLeme
Where is the line 309?
– user28595
The small 309 is: System.out.println(grava2.getListaMateria(). get(i). getLogin()+" n"+grava2.getListaMateria(). get(i). getSelf());
– MarcosLeme
As I said before, you must be accessing a non-existent input from the arrayList. Maybe adding a [mcve] will be possible to locate the error.
– user28595
Another detail, the array is empty, check your method that fills it with TXT, probably nothing is being copied.
– user28595
I managed to resolve the situation,@diegofm
– MarcosLeme