Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

drawImage method only paints partial image (when image is loaded from Jar)

Posted on 2002-07-19
4
Medium Priority
?
304 Views
Last Modified: 2010-05-18
I have a Java application that loads gif images and paints them in a JPanel.  It works great until I deploy that application in a Jar, then it only paints the top 25% of the image.  I've tried using both a compressed jar and an uncompressed jar, and the results are the same.

I am using MediaTracker to ensure that the image is completely loaded with no errors before I paint the image.  But the image still doens't display correctly.



0
Comment
Question by:AGE_Nicolls
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 1

Author Comment

by:AGE_Nicolls
ID: 7166024
Never mind.  I've figured it out.  For those interested, here is what I've found:

I was loading images as follows:

==========================================================
Image img;
InputStream in = getClass().getResourceAsStream("x.gif");
byte[] bytes = new byte[in.available()];
in.read(bytes);
img = Toolkit.getDefaultToolkit().createImage(bytes);
==========================================================                

When I changed the code to use getResource() instead of getResourceAsStream - it not only fixed the prblem, but simplified my code as well.


==========================================================
URL resUrl = getClass().getResource(resourceName);
img = Toolkit.getDefaultToolkit().createImage(resUrl);
==========================================================

I'd like to delete this question, but I'm not sure how...

-Matt
0
 
LVL 92

Expert Comment

by:objects
ID: 7166187
in.read(bytes);

Your problem was that the line above does not necessarily read all the bytes.
0
 
LVL 1

Author Comment

by:AGE_Nicolls
ID: 7169669
That's interesting...  When I checked the size of the byte array, it matched the size of the file.  I'll keep that in mind in the future though.

-Matt
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 7170537
points refunded and placed in PAQ

Computer101
E-E Moderator
0

Featured Post

Build and deliver software with DevOps

A digital transformation requires faster time to market, shorter software development lifecycles, and the ability to adapt rapidly to changing customer demands. DevOps provides the solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
In this post we will learn different types of Android Layout and some basics of an Android App.
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question