`make clean` also removes generated Java source files
`make clean` also removes generated Java source files

hkuplg/fcore,xnning/fcore,hkuplg/fcore,zhiyuanshi/fcore,xnning/fcore,zhiyuanshi/fcore,wxzh/fcore,zhiyuanshi/fcore,bixuanzju/fcore,bixuanzju/fcore,hkuplg/fcore,wxzh/fcore,wxzh/fcore,xnning/fcore,bixuanzju/fcore