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

x
?
Solved

need help, swing application problem with java help 2.0

Posted on 2006-07-13
4
Medium Priority
?
338 Views
Last Modified: 2009-07-01
Does someone know what purpose's this code using for?

        javax.swing.UIManager.getLookAndFeelDefaults().put("ClassLoader", getClass().getClassLoader());


My application using JDesktopPane to build MDI environments, if i put that code begin of my application (before show scrollpane app) my application worked without any error, but my application using javahelp to support help to user, when invoke help it throws error below

UIDefaults.getUI() failed: no ComponentUI class for: javax.help.JHelpContentViewer[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=0,maximumSize=,minimumSize=,preferredSize=]
java.lang.Error

if i clear line javax.swing.UIManager.getLookAndFeelDefaults().put("ClassLoader", getClass().getClassLoader()); out of my application, javahelp working correct but if i create any JInternalFrame it show error like this :

UIDefaults.getUI() failed: no ComponentUI class for: javax.swing.JInternalFrame$JDesktopIcon[,0,0,0x0,invalid,hidden,alignmentX=0.0,alignmentY=0.0,border=,flags=0,maximumSize=,minimumSize=,preferredSize=]
java.lang.Error

Please show me what purpose of line : javax.swing.UIManager.getLookAndFeelDefaults().put("ClassLoader", getClass().getClassLoader());

and how can i fix this problem, thanks
0
Comment
Question by:k6t
[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
  • 3
4 Comments
 
LVL 35

Expert Comment

by:girionis
ID: 17098072
k6t,
> javax.swing.UIManager.getLookAndFeelDefaults().put("ClassLoader",
> getClass().getClassLoader());

This line puts in the UIDefaults (which is a hashtable and you get it when you do javax.swing.UIManager.getLookAndFeelDefaults()) the classloader that renders the component you are using.

For a possible solution have a look here: http://javootoo.l2fprod.com/forum/viewtopic.php?topic=237&forum=1&10
0
 
LVL 35

Accepted Solution

by:
girionis earned 2000 total points
ID: 17098102
You mainly need to try the last suggestion

"I fixed that problem in the main-method:


public static void main(String[] args){

File file = new File("/*the dir of the skinlf.jar*/");
URL url = file.toURL();
UrlClassLoader loader = new UrlClassLoader(new URL[]{url});
Thread.currentThread().setContextClassLoader(loader);
}"
0
 

Author Comment

by:k6t
ID: 17105164
hi, thanks for reply, but my application not using any another skin, it using default skin of swing, so in block of code you give me, which java file i need to put in that code? (replace skinlf.jar), thanks
0
 
LVL 35

Expert Comment

by:girionis
ID: 17106124
Hello, sorry I just saw your message, do you still have problem with the l&f?
0

Featured Post

The top UI technologies you need to be aware of

An important part of the job as a front-end developer is to stay up to date and in contact with new tools, trends and workflows. That’s why you cannot miss this upcoming webinar to explore the latest trends in UI technologies!

Question has a verified solution.

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

Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
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 about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Suggested Courses

660 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