use JTable and get multipple width header

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kylin - 18 Oct 2004 09:15 GMT

I know the class "GroupableHeaderExample.java" can get it
for example:
* |-----------------------------------------------------|
* | | Name | Language |
* | |-----------------|--------------------------|
* | SNo. | | | | Others |
* | | 1 | 2 | Native |-----------------|
* | | | | | 2 | 3 |
* |-----------------------------------------------------|
* | | | | | | |

but in fact this class run with Exception:
java.lang.NullPointerException
    at tame.table.GroupableTableHeaderUI.getHeaderHeight(GroupableTableHeaderUI.java:97)
    at tame.table.GroupableTableHeaderUI.createHeaderSize(GroupableTableHeaderUI.java:118)
    at tame.table.GroupableTableHeaderUI.getPreferredSize(GroupableTableHeaderUI.java:128)
    at javax.swing.JComponent.getPreferredSize(JComponent.java:1275)
    at javax.swing.ViewportLayout.preferredLayoutSize(ViewportLayout.java:75)
    at java.awt.Container.preferredSize(Container.java:1178)
    at java.awt.Container.getPreferredSize(Container.java:1162)
    at javax.swing.JComponent.getPreferredSize(JComponent.java:1277)
    at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:702)
    at java.awt.Container.layout(Container.java:1020)
    at java.awt.Container.doLayout(Container.java:1010)
    at java.awt.Container.validateTree(Container.java:1092)
    at java.awt.Container.validateTree(Container.java:1099)
    at java.awt.Container.validateTree(Container.java:1099)
    at java.awt.Container.validateTree(Container.java:1099)
    at java.awt.Container.validateTree(Container.java:1099)
    at java.awt.Container.validate(Container.java:1067)
    at java.awt.Window.show(Window.java:461)
    at java.awt.Component.show(Component.java:1133)
    at java.awt.Component.setVisible(Component.java:1088)
    at tame.examples.GroupableHeaderExample.main(GroupableHeaderExample.java:72)

I don't know what's wrong, help me pls.

regards

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Paul Lutus - 18 Oct 2004 17:42 GMT

> I know the class "GroupableHeaderExample.java" can get it
> for example:
[quoted text clipped - 10 lines]
> java.lang.NullPointerException
> at ... [ snip stack trace ]

/ ...

> I don't know what's wrong, help me pls.

But it is obvious what is wrong. The problem is in the code you didn't post.
Create and post a short, compilable, working example that shows the
problem.

Signature

Paul Lutus
http://www.arachnoid.com

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mitch gart - 20 Oct 2004 14:37 GMT

Paul Lutus <nospam@nosite.zzz> wrote in message

> But it is obvious what is wrong. The problem is in the code you didn't post.
> Create and post a short, compilable, working example that shows the
> problem.

The code is in this discussion:

http://groups.google.com/groups?hl=en&lr=&th=c73b1a853a327f71&rnum=1

and is related to this article:

http://www.codeguru.com/java/articles/139.shtml

The source files can be downloaded from the article.

- Mitch Gart

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Paul Lutus - 20 Oct 2004 17:26 GMT

> Paul Lutus <nospam@nosite.zzz> wrote in message
>> But it is obvious what is wrong. The problem is in the code you didn't
>> post. Create and post a short, compilable, working example that shows the
>> problem.
>
> The code is in this discussion:

A discussion in this very newsgroup. Please explain why you have started a
new thread on the same topic.

If you choose to start a new thread, you must provide the same information
all over again. You are much better off posting follow-ups to the thread
you started.

Signature

Paul Lutus
http://www.arachnoid.com

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use JTable and get multipple width header

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