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javazip

Way to check if a ZIP file is empty?

I'm using a pre-built method that returns an object of type File. It's known that the file I'm receiving is a zip of a directory. What's the quickest way I could check if it's empty i.e. has no files? Do i need to necessarily extract it?

EDIT: I think I may have ambiguously worded the title. My requirement is to check that the number of entries in the zipped directory are zero. Sorry for any confusion.

Solution

  • To check is a zip file is empty:

    boolean isEmpty;
try (ZipFile zipFile = new ZipFile(file)) {
    isEmpty = (zipFile.size() == 0);
}