import java.util.Date;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
Date lastModified = new Date(ze.getTime());
long uncompressedSize = ze.getSize();
long compressedSize = ze.getCompressedSize();
int method = ze.getMethod();
if (method == ZipEntry.STORED) {
System.out.println(name + " was stored at " + lastModified);
System.out.println("with a size of " + uncompressedSize + " bytes");
} else if (method == ZipEntry.DEFLATED) {
System.out.println(name + " was deflated at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
} else {
System.out.println(name + " was compressed at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
}
}
}
}
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