I go to project > Generate JavaDoc > public > finish.

I get this error:

Loading source file

C:\Users\Ethb2\eclipse-workspace\POSSystemV1\src\module-info.java:2: error: module not found: javafx.controls
    requires javafx.controls;
                   ^
C:\Users\Ethb2\eclipse-workspace\POSSystemV1\src\module-info.java:4: error: module not found: javafx.graphics
    requires javafx.graphics;
                   ^
2 errors