Article View: borland.public.jbuilder.java.swing
Article #9678Re: Null pointer exception for JList-derived class
From: janene_r_mccrillis
Date: Tue, 15 Feb 2000 00:00
Date: Tue, 15 Feb 2000 00:00
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1666 bytes
In article <38a87c52.0@news.dot.state.oh.us>, "James Cook" <jimcook.spaminator@remove.for.spam.iname.com> wrote: > Janene, can you post any references to MyList from your jbInit method? Well, I did figure out that the Designer had initialized the viewport for the scrollpane to null, so when it later tried to do the myScrollpane.getViewport.add(mylist_variable, null); there was no viewport and the getViewport returned null, hence my null pointer exception. I removed the line setting the viewport to null and that seems to have worked, but why did the designer put that in in the first place? > Also, how did you go about adding MyList to your GUI while in the designer? > Did you add MyList to the toolbar palette? Yes, I added it to the "Other" tab of the palette then just dragged it into place like any other component. Is there something more I'm supposed to do? Janene Sent via Deja.com http://www.deja.com/ Before you buy.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 111d45,36010c081a23917d X-Google-Attributes: gid111d45,public From: janene_r_mccrillis@my-deja.com Subject: Re: Null pointer exception for JList-derived class Date: 2000/02/15 Message-ID: <88c4fu$nte$1@nnrp1.deja.com> X-Deja-AN: 586026412 References: <889tfc$6bo$1@nnrp1.deja.com> <38a87c52.0@news.dot.state.oh.us> X-Http-Proxy: 1.0 x26.deja.com:80 (Squid/1.1.22) for client 204.68.140.35 Organization: Deja.com - Before you buy. X-Article-Creation-Date: Tue Feb 15 18:04:49 2000 GMT X-MyDeja-Info: XMYDJUIDjanene_r_mccrillis Newsgroups: borland.public.jbuilder.java.swing X-Http-User-Agent: Mozilla/4.61 [en] (WinNT; U)