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Error: Main method not found in class Demo, please define the main method as:public static void main(String[] args)or a JavaFX application class must extend javafx.application. Application​

Answer»

Answer:

Create a main method in java .In your CLASS DEMO , create a main method as public STATIC void main(STRING[] args) .else you can EXTEND demo class to any other class which has a main method like class demo extends xyz(name of that main method containg class).



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