jTextfield Übergabe des Strings

[bananenelefant]

Hallo Community,

ich hätte ein Problem und bin bis jetzt noch nicht auf eine Antwort gestoßen..
ich programmier zur Zeit an einer simplen Accountverwaltung, habe jedoch zuvor noch nie in Java programmiert und frage mich deshalb wie man das eingegeben in einem JTextfield einer Funktion übergeben kann. In dem Fall möchte ich zum Beispiel Vorname, Nachname, Accountname, Passwort der Funktion createNew(....) übergeben.

Soweit bin ich im Moment gekommen nun möchte ich die GUI verknüpfen

Accounts:

package BudgetPlaner;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


/**
 *
 * @author Flo
 */
public class Accounts {


    static void createNew(String vornname, String nachnname, String Accountnname, String Passswort) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }


   public String vorname, nachname, accountname, passwort;
    
   public Accounts(String vn, String nn, String an, String pw){
       vorname = vn;
       nachname = nn;
       accountname = an;
       passwort = hashPasswort(pw);
   } 
   public static String hashPasswort(String passwort){
       String hashword = null;
       
       try {    
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                md5.update(passwort.getBytes());
                BigInteger hash = new BigInteger(1, md5.digest());
                hashword = hash.toString(16);
       } catch(NoSuchAlgorithmException nsae){
           
       }
       
       return hashword;
   }   
}

Accountverwaltung:

package BudgetPlaner;


import java.util.ArrayList;
import javax.swing.JOptionPane;
/**
 *
 * @author Flo 
 */
public class Accountverwaltung {
   
    ArrayList<Accounts> list = new ArrayList<>();
    
    public boolean validName(String name) {
        for(int i = 0; i < list.size(); i++){
            if(name.equals(list.get(i).accountname)) {
                JOptionPane.showMessageDialog(null, "Der Accountname " +name +"ist bereits vergeben.");
                return false;
            }
        }
        return true;
    }
    
    public Accounts createNew(String vn,String nn,String an, String pw){
        if(validName(an)) {
           Accounts neu = new Accounts(vn,nn,an,pw);
           list.add(neu);
        }
        return null;
    }
    
    public boolean LogIn(String Accountname, String Password){
        for(int i = 0; i < list.size(); i++){
            if(Accountname.equals(list.get(i).accountname))
                if(list.get(i).passwort.equals(Accounts.hashPasswort(Password)))
                    return true;
            else
                    JOptionPane.showMessageDialog(null, "Der Accountname oder das Passwort wurde falsch eingegeben oder existiert nicht.");
        }
        return false;
    }
    
}

Mit Freundlichen Grüßen Flo

 

[javampir]

hi,
google sagt dass du den text eines textfields mit tf.getText() als string bekommst

 

[bananenelefant]

ja und wie soll ich den dann übergeben so dass meine Funktion weiß das es zum beispiel beim ersten Textfeld der Vorname ist und beim 2ten der Nachname ?

 

[javampir]

nun ja, ich hab leider die namen deiner textfelder nicht...

accoutsObject.createNew(tfvorname.getText(), tfnachname.getText(), tfaccoutname.getText(), tfpasswort.getText());

einfach die argumente in der richtigen reihen folge übergeben

 

[Robinson97]

Meinst du das so ?

String textfeld1 = tf_1.getText()
         String textfeld2 = tf_2.getText()

 

[bananenelefant]

Funktioniert noch immer nicht..

/* * 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 BudgetPlaner;


import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;
import java.util.Arrays;
import javax.swing.JOptionPane;
import javax.swing.JTextField;


/**
 *
 * @author Flo
 */
public class NewProfile extends javax.swing.JFrame {


    /**
     * Creates new form NewJFrame2
     */
    public NewProfile() {
        initComponents();
    }


    /**
     * 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() {


        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jLabel6 = new javax.swing.JLabel();
        jPasswordField1 = new javax.swing.JPasswordField();
        jPasswordField2 = new javax.swing.JPasswordField();
        jLabel7 = new javax.swing.JLabel();


        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setLocation(new java.awt.Point(500, 250));
        setMinimumSize(new java.awt.Dimension(800, 587));
        setResizable(false);
        setSize(new java.awt.Dimension(800, 587));
        getContentPane().setLayout(null);


        jButton1.setText("Erzeuge Profil");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        getContentPane().add(jButton1);
        jButton1.setBounds(469, 359, 173, 36);


        jLabel1.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel1.setText("Vorname :");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(134, 143, 81, 23);


        jLabel2.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel2.setText("Nachname:");
        getContentPane().add(jLabel2);
        jLabel2.setBounds(134, 184, 81, 30);


        jLabel3.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel3.setText("Accountname:");
        getContentPane().add(jLabel3);
        jLabel3.setBounds(134, 235, 81, 15);


        jLabel4.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel4.setText("Passwort: ");
        getContentPane().add(jLabel4);
        jLabel4.setBounds(134, 274, 58, 15);


        jLabel5.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel5.setText("Passwort bestätigen:");
        getContentPane().add(jLabel5);
        jLabel5.setBounds(134, 313, 116, 15);


        jTextField1.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField1ActionPerformed(evt);
            }
        });
        getContentPane().add(jTextField1);
        jTextField1.setBounds(294, 144, 176, 21);


        jTextField2.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        getContentPane().add(jTextField2);
        jTextField2.setBounds(294, 189, 176, 21);


        jTextField3.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField3ActionPerformed(evt);
            }
        });
        getContentPane().add(jTextField3);
        jTextField3.setBounds(294, 232, 176, 21);


        jLabel6.setFont(new java.awt.Font("Arial", 3, 36)); // NOI18N
        jLabel6.setText("Neues Profil");
        getContentPane().add(jLabel6);
        jLabel6.setBounds(80, 50, 250, 43);


        jPasswordField1.setFocusTraversalPolicyProvider(true);
        jPasswordField1.setPreferredSize(new java.awt.Dimension(6, 21));
        jPasswordField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jPasswordField1ActionPerformed(evt);
            }
        });
        getContentPane().add(jPasswordField1);
        jPasswordField1.setBounds(294, 270, 176, 21);


        jPasswordField2.setFocusTraversalPolicyProvider(true);
        jPasswordField2.setPreferredSize(new java.awt.Dimension(6, 21));
        jPasswordField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jPasswordField2ActionPerformed(evt);
            }
        });
        getContentPane().add(jPasswordField2);
        jPasswordField2.setBounds(294, 310, 176, 21);


        jLabel7.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Gui_bilder/weiß_NewProfile.jpg"))); // NOI18N
        getContentPane().add(jLabel7);
        jLabel7.setBounds(-60, -10, 880, 590);


        pack();
    }// </editor-fold>                        


    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
         
        Accounts.createNew(jTextField1.getText(), jTextField2.getText(), jTextField3.getText(), Arrays.toString(jPasswordField1.getPassword()));
        setVisible(false);
        LoginFenster.LogIn();
        
    }                                        


    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                            
            
    }                                           


    private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           


    private void jPasswordField1ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               


    private void jPasswordField2ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               


    /**
     * @param args the command line arguments
     */
    public static void zweitesFenster() {
        /* 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 [URL="http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html"]How to Set the Look and Feel (The Javaâ„¢ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)[/URL] 
         */
        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(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        //</editor-fold>


        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewProfile().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    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.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JPasswordField jPasswordField1;
    private javax.swing.JPasswordField jPasswordField2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    // End of variables declaration                   
}

habs jez so geändert Zeile: 164 komme aber nicht mehr zum LogIn Fenster

und in der Run leiste zeigt er nur das hier an
Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedOperationException: Not supported yet.
at BudgetPlaner.Accounts.createNew(Accounts.java:19)
at BudgetPlaner.NewProfile.jButton1ActionPerformed(NewProfile.java:146)
at BudgetPlaner.NewProfile.access$000(NewProfile.java:17)
at BudgetPlaner.NewProfile$1.actionPerformed(NewProfile.java:59)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
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:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
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$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.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$1.doIntersectionPrivilege(ProtectionDomain.java:75)
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)

 

[bananenelefant]

kann es sein das meine funktion createNew falsch ist?

 

[javampir]

nein, funktioniert doch. in deiner funktion createnew steht, dass eine exception geworfen werden soll

 

[javampir]

ach sorry, das ist aber kein feiner stil, hab nicht gesehen dass du in 2 unterschiedlichen klassen diese methode hast. entweder rufst du diese in der ersten klasse oder in der zweiten auf. aber in Accounts steht nun mal, dass bei createnew eine exception geworfen werden soll. so musst du halt am anderen objekt aufrufen

 

[bananenelefant]

die hab ich unbeabsichtigt reingefügt des ist mir grad erst aufgefallen brauche ich die denn ?
und wieso komme ich dann nicht mehr auf mein LogIn Fenster

package BudgetPlaner;


import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


/**
 *
 * @author Flo
 */
public class Accounts {


   protected String vorname, nachname, accountname, passwort;
    
   public Accounts(String vn, String nn, String an, String pw){
       vorname = vn;
       nachname = nn;
       accountname = an;
       passwort = hashPasswort(pw);
   } 
   public static String hashPasswort(String passwort){
       String hashword = null;
       
       try {    
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                md5.update(passwort.getBytes());
                BigInteger hash = new BigInteger(1, md5.digest());
                hashword = hash.toString(16);
       } catch(NoSuchAlgorithmException nsae){
           
       }
       
       return hashword;
   }   
}

das ist die richtige wie ich sie habe

 

[javampir]

an dem code den du gepostet hast sieht man keine oberflächenaufrufroutinen. ob du die bracuhst musst du selber wissen. vom sinn der klassennamen her würd ich sagen nein

 

[bananenelefant]

Mit LoginFenster.LogIn() ruf ich das LogIn fenster eigentlich wieder auf aber das geht nicht wenn ich davor die textfields übergeben will

 

[javampir]

was heißt du kommst nicht mehr auf dein fenster?

 

[bananenelefant]

ja wenn ich auf profil erzeugen klicke also auf den button dann sollte er mir ja die werte die ich zuvor in textfields eingegeben habe abspeichern als accounts in eine liste, und zugleich das fenster profil erzeugen ausblenden und das LogIn Fenster wieder einblenden damit ich mich dann in mein programm einloggen kann

 

[javampir]

aber das ist vermutlich ein problem der oberfläche. du hast hier noch kein bisschen code zur oberfläche gepostet
wird dann vlt noch eine exception geworfen?

 

[Joose]

ich programmier zur Zeit an einer simplen Accountverwaltung, habe jedoch zuvor noch nie in Java programmiert und frage mich deshalb wie man das eingegeben in einem JTextfield einer Funktion übergeben kann. In dem Fall möchte ich zum Beispiel Vorname, Nachname, Accountname, Passwort der Funktion createNew(....) übergeben.

Das grundlegende Problem ist die gewollte Programmierung ohne die Grundlagen zu beherrschen.
Werte als Parameter an Methoden zu übergeben sowie die Grundlagen der OOP sollte man sich anlegen bevor man anfängt eine UI zu gestalten.
(Aber das mal nur so nebenbei)

Da du eine IDE verwendest, kannst du auch den Debugger einsetzen um deine Fehler zu finden!

ja wenn ich auf profil erzeugen klicke also auf den button dann sollte er mir ja die werte die ich zuvor in textfields eingegeben habe abspeichern als accounts in eine liste, und zugleich das fenster profil erzeugen ausblenden und das LogIn Fenster wieder einblenden damit ich mich dann in mein programm einloggen kann

Dann zeige uns doch bitte den entsprechenden Code, der dies bewerkstelligen soll. Und nicht einfach irgendwelche Klassen
Wie oben schon gesagt kannst du auch den Debugger deiner IDE verwenden um deinen Code Schritt für Schritt nachzuvollziehen.

 

[bananenelefant]

das ist alles was ich habe:

LogInFenster(GuI):

/*
 * 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 BudgetPlaner;


import com.sun.org.apache.xerces.internal.util.DOMUtil;
import javax.swing.JOptionPane;


/**
 *
 * @author Flo
 */
public class LoginFenster extends javax.swing.JFrame {


    /**
     * Creates new form NewJFrame1
     */
    public LoginFenster() {
        initComponents();
    }


    /**
     * 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() {


        jToggleButton1 = new javax.swing.JToggleButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jEditorPane1 = new javax.swing.JEditorPane();
        jFormattedTextField1 = new javax.swing.JFormattedTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        jLabel8 = new javax.swing.JLabel();
        jLabel1 = new javax.swing.JLabel();
        jButton2 = new javax.swing.JButton();
        jFormattedTextField2 = new javax.swing.JFormattedTextField();
        jPasswordField1 = new javax.swing.JPasswordField();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jToggleButton2 = new javax.swing.JToggleButton();
        jButton1 = new javax.swing.JButton();
        jLabel9 = new javax.swing.JLabel();
        jLabel10 = new javax.swing.JLabel();


        jScrollPane1.setViewportView(jEditorPane1);


        jFormattedTextField1.setText("jFormattedTextField1");


        jLabel2.setIcon(new javax.swing.ImageIcon("C:\\Users\\Flo\\Pictures\\11102789_380758915449755_539784323841267135_n.jpg")); // NOI18N


        jLabel5.setIcon(new javax.swing.ImageIcon("C:\\Users\\Flo\\Pictures\\11102789_380758915449755_539784323841267135_n.jpg")); // NOI18N


        jLabel6.setIcon(new javax.swing.ImageIcon("C:\\Users\\Flo\\Pictures\\11102789_380758915449755_539784323841267135_n.jpg")); // NOI18N


        jLabel7.setIcon(new javax.swing.ImageIcon("C:\\Users\\Flo\\Pictures\\11102789_380758915449755_539784323841267135_n.jpg")); // NOI18N


        jLabel8.setIcon(new javax.swing.ImageIcon("C:\\Users\\Flo\\Pictures\\Holzarten_Weiss_gross_34.jpg")); // NOI18N


        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setLocation(new java.awt.Point(500, 250));
        setMinimumSize(new java.awt.Dimension(877, 626));
        setResizable(false);
        setSize(new java.awt.Dimension(877, 626));
        getContentPane().setLayout(null);


        jLabel1.setFont(new java.awt.Font("Arial", 3, 48)); // NOI18N
        jLabel1.setText("Budget Planer");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(260, 30, 370, 80);


        jButton2.setText("Neues Profil");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });
        getContentPane().add(jButton2);
        jButton2.setBounds(700, 483, 120, 60);


        jFormattedTextField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jFormattedTextField2ActionPerformed(evt);
            }
        });
        getContentPane().add(jFormattedTextField2);
        jFormattedTextField2.setBounds(400, 230, 120, 30);
        getContentPane().add(jPasswordField1);
        jPasswordField1.setBounds(400, 320, 120, 30);


        jLabel3.setFont(new java.awt.Font("Arial", 0, 24)); // NOI18N
        jLabel3.setText("Benutzername");
        getContentPane().add(jLabel3);
        jLabel3.setBounds(330, 190, 170, 20);


        jLabel4.setFont(new java.awt.Font("Arial", 0, 24)); // NOI18N
        jLabel4.setText("Passwort");
        getContentPane().add(jLabel4);
        jLabel4.setBounds(330, 200, 150, 170);


        jToggleButton2.setText("Account löschen");
        getContentPane().add(jToggleButton2);
        jToggleButton2.setBounds(400, 410, 120, 30);


        jButton1.setText("Einloggen");
        getContentPane().add(jButton1);
        jButton1.setBounds(400, 370, 120, 30);


        jLabel9.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Gui_bilder/muenzen__large.jpg"))); // NOI18N
        getContentPane().add(jLabel9);
        jLabel9.setBounds(-40, 370, 460, 540);


        jLabel10.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Gui_bilder/weiß_LoginFenster.gif"))); // NOI18N
        getContentPane().add(jLabel10);
        jLabel10.setBounds(-20, -30, 880, 670);


        pack();
    }// </editor-fold>                        


    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        NewProfile.zweitesFenster();
        setVisible(false);
    }                                        


    private void jFormattedTextField2ActionPerformed(java.awt.event.ActionEvent evt) {                                                     
        // TODO add your handling code here:
    }                                                    


    /**
     * @param args the command line arguments
     */
    public static void LogIn() {
        /* 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 [url=http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html]How to Set the Look and Feel (The Javaâ„¢ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)[/url] 
         */
        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(LoginFenster.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(LoginFenster.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(LoginFenster.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(LoginFenster.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        //</editor-fold>


        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new LoginFenster().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JEditorPane jEditorPane1;
    private javax.swing.JFormattedTextField jFormattedTextField1;
    private javax.swing.JFormattedTextField jFormattedTextField2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel10;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JLabel jLabel8;
    private javax.swing.JLabel jLabel9;
    private javax.swing.JPasswordField jPasswordField1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JToggleButton jToggleButton1;
    private javax.swing.JToggleButton jToggleButton2;
    // End of variables declaration                   
}

NewProfile(GUI):

/*
 * 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 BudgetPlaner;


import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;
import java.util.Arrays;
import javax.swing.JOptionPane;
import javax.swing.JTextField;


/**
 *
 * @author Flo
 */
public class NewProfile extends javax.swing.JFrame {


    /**
     * Creates new form NewJFrame2
     */
    public NewProfile() {
        initComponents();
    }


    /**
     * 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() {


        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jLabel6 = new javax.swing.JLabel();
        jPasswordField1 = new javax.swing.JPasswordField();
        jPasswordField2 = new javax.swing.JPasswordField();
        jLabel7 = new javax.swing.JLabel();


        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setLocation(new java.awt.Point(500, 250));
        setMinimumSize(new java.awt.Dimension(800, 587));
        setResizable(false);
        setSize(new java.awt.Dimension(800, 587));
        getContentPane().setLayout(null);


        jButton1.setText("Erzeuge Profil");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        getContentPane().add(jButton1);
        jButton1.setBounds(469, 359, 173, 36);


        jLabel1.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel1.setText("Vorname :");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(134, 143, 81, 23);


        jLabel2.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel2.setText("Nachname:");
        getContentPane().add(jLabel2);
        jLabel2.setBounds(134, 184, 81, 30);


        jLabel3.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel3.setText("Accountname:");
        getContentPane().add(jLabel3);
        jLabel3.setBounds(134, 235, 81, 15);


        jLabel4.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel4.setText("Passwort: ");
        getContentPane().add(jLabel4);
        jLabel4.setBounds(134, 274, 58, 15);


        jLabel5.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jLabel5.setText("Passwort bestätigen:");
        getContentPane().add(jLabel5);
        jLabel5.setBounds(134, 313, 116, 15);


        jTextField1.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField1ActionPerformed(evt);
            }
        });
        getContentPane().add(jTextField1);
        jTextField1.setBounds(294, 144, 176, 21);


        jTextField2.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        getContentPane().add(jTextField2);
        jTextField2.setBounds(294, 189, 176, 21);


        jTextField3.setFont(new java.awt.Font("Arial", 0, 12)); // NOI18N
        jTextField3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField3ActionPerformed(evt);
            }
        });
        getContentPane().add(jTextField3);
        jTextField3.setBounds(294, 232, 176, 21);


        jLabel6.setFont(new java.awt.Font("Arial", 3, 36)); // NOI18N
        jLabel6.setText("Neues Profil");
        getContentPane().add(jLabel6);
        jLabel6.setBounds(80, 50, 250, 43);


        jPasswordField1.setFocusTraversalPolicyProvider(true);
        jPasswordField1.setPreferredSize(new java.awt.Dimension(6, 21));
        jPasswordField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jPasswordField1ActionPerformed(evt);
            }
        });
        getContentPane().add(jPasswordField1);
        jPasswordField1.setBounds(294, 270, 176, 21);


        jPasswordField2.setFocusTraversalPolicyProvider(true);
        jPasswordField2.setPreferredSize(new java.awt.Dimension(6, 21));
        jPasswordField2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jPasswordField2ActionPerformed(evt);
            }
        });
        getContentPane().add(jPasswordField2);
        jPasswordField2.setBounds(294, 310, 176, 21);


        jLabel7.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Gui_bilder/weiß_NewProfile.jpg"))); // NOI18N
        getContentPane().add(jLabel7);
        jLabel7.setBounds(-60, -10, 880, 590);


        pack();
    }// </editor-fold>                        


    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        setVisible(false);
        LoginFenster.LogIn();
    }                                        


    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                            
            
    }                                           


    private void jTextField3ActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           


    private void jPasswordField1ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               


    private void jPasswordField2ActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
    }                                               


    /**
     * @param args the command line arguments
     */
    public static void zweitesFenster() {
        /* 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 [url=http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html]How to Set the Look and Feel (The Javaâ„¢ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)[/url] 
         */
        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(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewProfile.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        //</editor-fold>


        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewProfile().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    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.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JPasswordField jPasswordField1;
    private javax.swing.JPasswordField jPasswordField2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    // End of variables declaration                   
}

Accounts:

/*
 * 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 BudgetPlaner;


import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


/**
 *
 * @author Flo
 */
public class Accounts {


   protected String vorname, nachname, accountname, passwort;
    
   public Accounts(String vn, String nn, String an, String pw){
       vorname = vn;
       nachname = nn;
       accountname = an;
       passwort = hashPasswort(pw);
   } 
   public static String hashPasswort(String passwort){
       String hashword = null;
       
       try {    
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                md5.update(passwort.getBytes());
                BigInteger hash = new BigInteger(1, md5.digest());
                hashword = hash.toString(16);
       } catch(NoSuchAlgorithmException nsae){
           
       }
       
       return hashword;
   }   
}

Accountverwaltung:

/*
 * 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 BudgetPlaner;


import java.util.ArrayList;
import javax.swing.JOptionPane;
/**
 *
 * @author Flo 
 */
public class Accountverwaltung {
   
    ArrayList<Accounts> list = new ArrayList<>();
    
    public boolean validName(String name) {
        for(int i = 0; i < list.size(); i++){
            if(name.equals(list.get(i).accountname)) {
                JOptionPane.showMessageDialog(null, "Der Accountname " +name +"ist bereits vergeben.");
                return false;
            }
        }
        return true;
    }
    
    public Accounts createNew(String vn,String nn,String an, String pw){
        if(validName(an)) {
           Accounts neu = new Accounts(vn,nn,an,pw);
           list.add(neu);
        }
        return null;
    }
    
    public boolean LogIn(String Accountname, String Password){
        for(int i = 0; i < list.size(); i++){
            if(Accountname.equals(list.get(i).accountname))
                if(list.get(i).passwort.equals(Accounts.hashPasswort(Password)))
                    return true;
            else
                    JOptionPane.showMessageDialog(null, "Der Accountname oder das Passwort wurde falsch eingegeben oder existiert nicht.");
        }
        return false;
    }
    
    public void deleteAccount(String Accountname, String Password){
        for(int i = 0; i < list.size(); i++){
            if(Accountname.equals(list.get(i).accountname))
                if(list.get(i).passwort.equals(Accounts.hashPasswort(Password))){
                    list.remove(i);
                    JOptionPane.showMessageDialog(null, "Der Account wurde erfolgreich entfernt.");
                }
            else
                    JOptionPane.showMessageDialog(null, "Der Accountname oder das Passwort wurde falsch eingegeben oder existiert nicht.");
        }
    }
}

Und natürlich meine main:

/*
 * 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 BudgetPlaner;


/**
 *
 * @author Flo
 */
public class BudgetPlanerMain {
    
    public static void main(String args[]){
        
      LoginFenster.LogIn();
      
    }
}