Hi Vignesh,
Open your project. Under Projects you can choose deploy for eclipse option. (Differs in version). It should be in one of the tab.
Once deploy for eclipse is completed, open eclipse and right click on the project explorer. Choose Import existing project, navigate to your project path and press okay.
Open JavaSource folder and it will point you where exactly the error is. Resolve this java error. Save, clean deployment directory and run the application again. This will solve the issue.
Regards,
Sharad R K
Are you going from Mendix 8.x.x to 9.2.0? If so, my suggestion is to just reimport the community commons module from the marketplace. In doing my own updates recently for this version change, that is what I did for my orgs apps and it fixed all java compilation errors.