java - How to get the actual size of selected files and folders? -

jfilechooser filechooser = new jfilechooser(); filechooser.setfileselectionmode(jfilechooser.files_and_directories); file selectedfile = filechooser.getselectedfile(); long sizeofdirectory = fileutils.sizeofdirectory(selectedfile); 

this isn't generating actual size of selected files , folders, gives value less actual value.

i selecting more 1 folder @ once.

how fix issue?

actually selecting 2 folders, issue happens

that's because jfilechooser#getselectedfile return one. need use jfilechooser#getselectedfiles , loop on them, calling fileutils.sizeofdirectory each file , summing results

file[] selectedfiles = filechooser.getselectedfiles(); long sizeofdirectory = 0; (file file : selectedfiles) {     sizeofdirectory += fileutils.sizeofdirectory(file); } 

(you should beware getselectedfile , getselectedfiles may return null)