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need help, swing application problem with java help 2.0

Posted on 2006-07-13
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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
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Question by:k6t
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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
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LVL 35

Accepted Solution

by:
girionis earned 500 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?
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