import java.io.*;
import java.util.*;
import java.util.jar.*;
public class JarDir {
public static void main (String args[])
throws IOException {
JarFile jarFile = new JarFile("yourJarFileName.jar");
Enumeration enum = jarFile.entries();
while (enum.hasMoreElements()) {
process(enum.nextElement());
}
}
private static void process(Object obj) {
JarEntry entry = (JarEntry)obj;
String name = entry.getName();
long size = entry.getSize();
long compressedSize = entry.getCompressedSize();
System.out.println(
name + "\t" + size + "\t" + compressedSize);
}
}