Java JarFile(File file, boolean verify, int mode) Constructor

public JarFile(File file,  boolean verify,  int mode)  throws IOException

/* w ww  .ja v a 2 s .c om*/
import java.io.File;
import java.util.Iterator;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

public class Main {
  public static void main(String[] argv) throws Exception {
    JarFile jarfile = new JarFile(new File("filename.jar"), true,JarFile.OPEN_READ);

    Manifest manifest = jarfile.getManifest();

    Attributes attrs = (Attributes) manifest.getMainAttributes();

    for (Iterator it = attrs.keySet().iterator(); it.hasNext();) {
      Attributes.Name attrName = (Attributes.Name) it.next();

      String attrValue = attrs.getValue(attrName);
    }
  }
}