it's an external tool that you have to download and install separatly. Java fx scene builder is not part of the java sdk nor the e(fx)clipse plugin. Hope this answer may help for the new users of eclipse like me.! fxml file and try open with 'scenebuilder'. go to the path initially copied in step 01, and find the 'javafx scene builder 2.0.exe' file (yours version may be different if install a later version).
then download the latest version that suits your os) then simply google search for 'javafxscenbuilder download'. (sometimes this link will not work when new updates are released. (mine: c:\program files (x86)\oracle\javafx scene builder 2.0) remember to copy the path where it will be installed. because this problem is often faced by newbies to javafx and eclipse ide. i will explain the steps very simply that could be understood by anybody. i am a windows user and i get my error fixed by a combination of methods as follows.
recently i get the same error in the question. Although the question is asked 07 years ago, still the problem persists.
