Get uncompressed and compressed file size in a Jar file : JarFile « File « Java Tutorial

1. Java Tutorial
2. File
3. JarFile

import java.io.IOException;
import java.util.Date;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class MainClass {

  public static void main(String[] args) throws IOException {

    JarFile jf = new JarFile(args[0]);
    Enumeration e = jf.entries();
    while (e.hasMoreElements()) {
      JarEntry je = (JarEntry) e.nextElement();
      String name = je.getName();
      Date lastModified = new Date(je.getTime());
      long uncompressedSize = je.getSize();
      long compressedSize = je.getCompressedSize();

      System.out.println(lastModified);
      System.out.println(uncompressedSize);
      System.out.println(compressedSize);
    }
  }
}