I still need commUtil class to write my logic, and about Dog or Cat class, it's just store get set. Next time there will be more than class dog or cat. maybe a hundred of class will used in commUtil. and those class will can be different by memebers of class.

In my case I can't use Object Casting.

Marco Alka Tested Result: 여보세요 -> 占싼됰궖占쎈챷�� and file type still UTF-8

They didn't install nodejs. before I used FileSaver.js library, but it can't use with other charset besides UTF-8. Do you know any libraries to do it?

I don't use Node js T.T