Write size with java.util.zip

Question

I noticed that creating a .zip file using the java.util.zip library doesn't write the size properly and because of that

zipEntry.getSize; //created with a ZipInputStream (zipEntry = zis.getNextEntry())
zipEntry.getCompressedSize();

both always return -1 .

This doesn't happen if I create zipEntry with a ZipFile and Enumeration - which I can't do in this particular case.

How do I make the library write the sizes properly?

Answer 1

I have tried the following code and returned sizes were good.

ZipInputStream zis = new ZipInputStream(new FileInputStream(new File("/tmp/foo.zip")));
ZipEntry entry = zis.getNextEntry();
System.out.println(entry.getSize());
System.out.println(entry.getCompressedSize());
zis.close();

I think the problem does not come from the way you call the library but might come from your zip file.