New to JavaFX--Calling Java objects from JavaFX

Hello,
I am a Java developer who is new to JavaFX. I am having no luck in finding a tutorial that exhibits more than just fun effects. I need to be able to call existing classes from a JavaFX GUI. Can anyone offer any assistance on this? It's very frustrating because this should be a simple task. If we are faced with having to rewrite existing code, we will probably be forced to abandon JavaFX. I hope this is not the case.
Thanks!

The answer is yes. The impementation is -
If you have classes that you keep as library classes that you intend for use irrespective of the platform, then I suspect that you have already written them with no view content. For those, including them in your JavaFX is not really different to using them in Java. I am just learning JavaFX too and the most important lesson for us to learn is that 'JavaFX is Java with FX on the end of it'. I know the strickly come dancing set will say 'oh but what about types'. Well I have found no trouble at all with types, basic or my own, we are in object world so long as the compiler has the class object and we have all stuck to the rules then it has all it needs to act on your objects.
So your non-View classes can be used as you always use them -
import mylib'
var somethingFromMyLibOfClasses = new mylib.ClassThatDoesSomethingVeryClever();
It is then just a matter of arranging a FX trigger of some kind (trigger/event/timer/bind) to call the function in your library.
Which triggers and when are the part I am still finding difficult. The basic GUI events are fine (onMouseClick etc), it is 'bind' that is troublesome.
Binding something in your code to a 'property' of the display element is easy enough, but binding where you have no external variable that relates to 'Property' value is less clear. For example you may have to change a form contents due to a trigger sent from a remote database.
You have some in the forum talking of 'resize your window a few pixels to force a redraw so that your code can be retriggered'. Others are using timers at high tick frequency to for an update. such as changing a property that you can't see.
That is utter nonsense, if you look up the proper description of bind then it becomes obvious. Bind can be a two way thing, you can change a value in your element from outside, but you can also change a value outside of your element from within your element.
Equally that trigger can be your own code. There is no need of trickery to update Scenes, the writters of JavaFX already have it sussed.
The Sun web site has some great tutirials, but as a personal favourite that cleared up som of the junk about JavaFX that was building up in my mind I reccommend you spend a bit of time here [JavaFX Refference|http://openjfx.java.sun.com/current-build/doc/reference/JavaFXReference.html]
Not the best layout you will ever see, but it is the best source I have found, then if you use that along side [Master Index|http://java.sun.com/javafx/1.2/docs/api/javafx.stage/javafx.stage.Stage.html] hopefully you will find, as I did, that you do not have to think differently to make use of the FX on the end of Java.

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===
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Hello,
I try to call a native method from java which calls java method from the same class. Exception (noSuchMethodError) is thrown. Any ideas?
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JNIEXPORT jint JNICALL Java_TestDll_Proc_1Mul_1Int_1Var_1Var_1Stdcall (JNIEnv * env, jclass jcl, jint jarg1, jint jarg2) {
int arg1;
int arg2;
int arg3;
jint res;
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jfieldID fid;
jmethodID mid;
int (* procedure) (int *, int * ,int *);
int mch;
arg1 = (int )jarg1;
arg2 = (int )jarg2;
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Something is wrong with the code you posted here.
Since your native method is not static, it should have the jobject instance as a parameter in the function prototype, not a jclass. Also, you should be calling CallObjectMethod with a jobject, not jclass.
Check out Jace at http://jace.reyelts.com/jace.
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-Toby Reyelts

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null

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sensitive. For example, if the keyword 'return' is in all
CAPS, this Call Spec will not compile.
Other optional parts of this syntax have been omitted here for simplicity.
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eg
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There are several important things to note here:
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3.) Parameter names do not need to match, but the number and types of
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See the references listed in 'Related Topics' for additional information.
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null

Error while calling java program from ABAP

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Pabi,
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New to JavaFX--Calling Java objects from JavaFX

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