How to estimate zip file size in java before creating it

Question

I am having a requirement wherein i have to create a zip file from a list of available files. The files are of different types like txt,pdf,xml etc.I am using java util clas

Answer 1

I dont think there is any way to estimate the size of zip that will be created because the zips are processed as streams. Also it would not be technically possible to predict the size of the created compressed format unless you actually compress it.