Java Help

clarification regarding DecimalFormat formatting..
For a particular application - I need to format decimals with strictly 6 digits , after the decimal separator (even if they are not significant ). More specifically I would like the following test case to succeed. public void testZeroFormatting() { DecimalFormat myformat = new DecimalFormat("#############.#... 8 Jul 2008 06:56

I don't understand the error
what is the problem here? import java.awt.image.PixelGrabber; public class Main { public static void main(String[] args) { int w = 50; int h = 50; int[] pixels = new int[w * h]; PixelGrabber pix = new PixelGrabber("C:/users/saftarn/desktop/ images/giffer.gif", 1, ... 20 Jul 2008 23:44

Using struts: checkbox list
HI! I'm starting studying struts and I need some help. My exercise is to retrive a list of person from a table on a db and to present it on a jsp: userList.jsp This list contains also a checkbox, one for evevery element of the list. The checked element will be deleted or updated. The problem is that I'm no... 7 Jul 2008 17:39

What is the compiler complaining about?
I odnt get the exact complaint here. and why am i filling in "w" in the end again? http://java.sun.com/j2se/1.4.2/docs/api/java/awt/image/PixelGrabber.html import java.awt.image.PixelGrabber; public class Main { public static void main(String[] args) { int w = 50; int h = 50; ... 8 Jul 2008 23:22

when call cipher.getInstance(), why throw Exception "The provider BC may not be availled by a trusted mankind"?
GArlington wrote: On Jul 7, 11:08 am, junzhang1...(a)gmail.com wrote: thank you in advanced.... Any details? Cipher cipher = Cipher(CipherSpi cipherSpi, Provider provider, String transformation) ? I think the "scavenge you" was a repost off a traditional prayer. Let this portion die and go back to... 7 Jul 2008 15:35

Authentication in webapp.
For a personal project, I'm creating a webapp that requires users to log in. I'm using Spring Framework 2.5 as the application framework, Hibernate for persistence, and Resin 3 as the application container. Security isn't yet that much of a concern, but I'd like to make sure I'm headed in the right direction ... 16 Jul 2008 13:00

How can I easily open and check pixels of an image?
I want to open a bunch of pictures and get their pixels. i want also to be able to display them this is easy enoguh in python but seems very complicated in Java. what library do you recommend? from PIL import Image import os print os.path.exists('C:/Users/saftarn/Desktop/images/blob.jpg') im2 = Image... 7 Jul 2008 15:35

Changing group permission using java in unix
Hi, I have a java application which will create files in a particular directory in the unix server.The application is started using root.When the file is created the permission it has is -rw-r-r.I need to change this and give group also rw.Anyone knows how to do this after file is created.I dont wanna run "chmod" ... 7 Jul 2008 16:37

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