I am looking for a detail explanation to the following question.
Can I use regular java syntax to develop JavaFX application? And if so why is the JavaFX scripting so important?
JavaFX Script was a language developed for JavaFX 1.x. It was dropped for JavaFX 2.x and is no longer supported or developed.
Can I use regular java syntax to develop JavaFX application?
Yes. All of the JavaFX 2.x system is accessible through regular Java language code running on a Java Virtual Machine. Here is a sample JavaFX program. You will notice it is just a Java application that provides a simple GUI.
And if so why is the JavaFX scripting so important?
Students studying the history of computer languages might interested might be interested the design of JavaFX Script's innovative binding features and declarative programming support. From a practical development point of view, JavaFX Script is completely obsolete and never used.
It's probably a good idea to review the JavaFX documentation in detail before asking further questions.