I was trying to build a database project in JavaFX using a scene builder. Everything worked fine with designing, creating CSS files and installing derby database library. But when I run the program, I get the error:
> Exception in Application start method
> java.lang.reflect.InvocationTargetException at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498) at
> com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
> at
> com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498) at
> sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
> Caused by: java.lang.RuntimeException: Exception in Application start
> method at
> com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
> at
> com.sun.javafx.application.LauncherImpl.lambda$launchApplication$1(LauncherImpl.java:182)
> at java.lang.Thread.run(Thread.java:748) Caused by:
> java.lang.UnsupportedClassVersionError:
> org/apache/derby/jdbc/EmbeddedDriver has been compiled by a more
> recent version of the Java Runtime (class file version 53.0), this
> version of the Java Runtime only recognizes class file versions up to
> 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:756) at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at
> java.net.URLClassLoader.access$100(URLClassLoader.java:74) at
> java.net.URLClassLoader$1.run(URLClassLoader.java:369) at
> java.net.URLClassLoader$1.run(URLClassLoader.java:363) at
> java.security.AccessController.doPrivileged(Native Method) at
> java.net.URLClassLoader.findClass(URLClassLoader.java:362) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:418) at
> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:351) at
> java.lang.Class.forName0(Native Method) at
> java.lang.Class.forName(Class.java:264) at
> db.db.Createconnection(db.java:34) at db.db.<init>(db.java:27) at
> javafxapplication3.FXMLDocumentController.initialize(FXMLDocumentController.java:36)
> at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124) at
> javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104) at
> javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097) at
> javafxapplication3.JavaFXApplication3.start(JavaFXApplication3.java:22)
> at
> com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
> at
> com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
> at
> com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
> at java.security.AccessController.doPrivileged(Native Method) at
> com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
> at
> com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
> at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at
> com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
> ... 1 more Exception running application
> javafxapplication3.JavaFXApplication3 Java Result: 1
By searching for similar problems, I found that I might be missing something called VM option(though I am not quite sure, what is that)
So I added this line in my VM option from netbeans project:
--module-path C:\javafx-sdk-11.0.2\lib --add-modules javafx.controls,javafx.fxml
This time I got a new error:
**
Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. The program will exit. Unrecognized option: --module-path Java Result: 1
Now I don't have any clue how to get rid of it.
I have in total of 4 files in my simple project. The main function is here:
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
This is the XML document controller:
@FXML
private Label label;
@FXML
private Button button;
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
label.setText("Hello World!");
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
db dbh = new db();
}
@FXML
private void pri(ActionEvent event) {
System.out.print("hi");
}
This is the code for creating connection with database:
public db()
{
Createconnection();
setupbooktable();
}
void Createconnection()
{
try
{
Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();
conn=DriverManager.getConnection(db_url);
}
catch(Exception e)
{
e.printStackTrace();
}
}
void setupbooktable()
{
String tablename="Book";
try
{
stam=conn.createStatement();
DatabaseMetaData dmd=conn.getMetaData();
ResultSet tables=dmd.getTables(null, null, tablename.toUpperCase(), null);
if(tables.next())
{
System.out.println("Table"+tablename+"exists already!Ready to go!!");
}
else
{
stam.execute("CREATE TABLE"+tablename+"("
+ "id varchar(200) primary key ,\n"
+ "title varchar(200),\n"
+ "author varchar(200),\n"
+ "publisher varchar(200),\n"
+ "intcode varchar(200),\n"
+ "isavailable boolean default true"
+")");
}
}
catch(SQLException e)
{
System.err.printf(e.getMessage()+"error in database...");
}
finally
{
}
}
I have no issues in importing packages. This project just prints a message on the prompt when the button is pressed. And try to create a database table.
Thanks.
