In meinem Programm gibt der Benutzer einen Benutzernamen und ein Passwort ein, das sich bereits in meiner SQL-Datenbank befindet und überprüft die Datenbank, um sicherzustellen, dass der Benutzername und das Passwort korrekt sind. Wenn ich jedoch versuche, Daten einzugeben und auf den Login-Button zu drücken, bekomme ich einen Argumenttyp-Mismatch-Fehler. Ich habe es bereits bekommen, Daten mit einem ähnlichen Layout zur Datenbank hinzuzufügen. Hier ist mein Code:(Java) (SQL) Ich versuche, eine Benutzereingabe für meine Datenbank zu überprüfen, um mich anzumelden, aber ich bekomme und argumentieren Typ Mismatch-Fehler?
Datenbankverbindungsklasse:
public class DataBaseConnect {
public static Connection getConnection() throws Exception{
try{
//get connection to database
String url = "jdbc:mysql://localhost:3306/csgoopenerdatabase?autoReconnect=true&useSSL=false";
String user = "root";
String password = "hockey33";
Connection con = DriverManager.getConnection(url,user,password);
System.out.println("Connected to database!");
//execute sql query
//process result set
return con;
}catch(Exception e){
System.out.println(e);
}
return null;
}
}
Controller-Klasse:
public class LoginController implements Initializable {
@FXML
protected static TextField UsernameFieldL;
@FXML
protected static PasswordField PasswordFieldL;
@FXML
private void handleLoginBack(MouseEvent event) throws IOException{
Parent handleInventoryBackParent = FXMLLoader.load(getClass().getResource("LoginCreateBuffer.fxml"));
Scene OPBackScene = new Scene(handleInventoryBackParent);
Stage handleInventoryBackStage = (Stage) ((Node) event.getSource()).getScene().getWindow();
handleInventoryBackStage.setScene(OPBackScene);
handleInventoryBackStage.show();
}
@FXML
private void handleLoginContinue(MouseEvent event) throws IOException, Exception{
CheckDB();
}
public static void CheckDB() throws Exception{
try{
//get connection to database
Connection conn = DataBaseConnect.getConnection();
//create a statement
PreparedStatement checkInfo = conn.prepareStatement("SELECT * FROM userinfo WHERE Username='"+UsernameFieldL.getText()+"' AND '"+PasswordFieldL.getText()+"'");
//process result set
checkInfo.executeQuery();
System.out.println("complete");
}
catch(Exception e){
e.printStackTrace();
}
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
}
}
ERROR:
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1451)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Node.fireEvent(Node.java:6866)
at javafx.scene.control.Button.fire(Button.java:179)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:193)
at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:336)
at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:329)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3369)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3209)
at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3164)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1582)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2267)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:250)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:173)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:292)
at com.sun.glass.ui.View.handleMouseEvent(View.java:530)
at com.sun.glass.ui.View.notifyMouse(View.java:924)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:17)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:67)
at java.lang.Thread.run(Thread.java:745)
Exception in thread "JavaFX Application Thread"
Zum Beispiel könnten Sie uns die genaue Fehlermeldung, die Sie bekommen, und die Codezeile, die es erzeugt ... –
Ich habe den Fehler für Sie hinzugefügt. – Tresk33
Wild rate: Ich denke, handleLoginBack (MouseEvent event) und handleLoginContinue (MouseEvent event) sind Tasten, die mit der Maus gedrückt werden. In diesem Fall sollten Sie MouseEvent in ActionEvent ändern. – Sedrick