java.util.zip
A package for handling Zip-files.
To list the files in a Zip-file:
ZipFile zipf = new ZipFile(filename);
for (Enumeration e = zipf.entries() ;
ZipEntry entry = (ZipEntry)e.nextElement();
System.out.println(entry.getName() + ": " +
entry.getSize()/1024 + " KB");