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Table Changes


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4 replies to this topic

#1 sausage

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Posted 08 February 2009 - 02:12 PM

I can't figure out how to edit the model of a Table without user input, for some reason I have some malware that won't let me go to the sun tutorials, I click on it in google and it takes me to some bullcrap shopping website

Anyways, I am just using the generated code in NetBeans

MapView.setModel(new javax.swing.table.DefaultTableModel(
//Cell Text
//Title Text
//other properties
));

It compiles right but whenever I run it, it gives a stupid exception

Exception in thread "main" java.lang.NullPointerException
at MainView.main(MainView.java:169)
Java Result: 1


Not sure exactly what that means so I thought I might ask here.

Full code located here: Download MainView.java
If I'm posting, I probably have something horribly wrong with my computer, there's no obvious explanation for it, that's just the way it is.

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#2 groovicus

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Posted 08 February 2009 - 02:37 PM

A null pointer exception means that one of your variables is not properly initialized, and it occurs at line 169 of the code.

#3 sausage

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Posted 08 February 2009 - 03:23 PM

Line 169 is the
MapView.setModel(new javax.swing.table.DefaultTableModel(
//Cell Text
//Title Text
//other properties
));

If I'm posting, I probably have something horribly wrong with my computer, there's no obvious explanation for it, that's just the way it is.

#4 groovicus

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Posted 08 February 2009 - 03:27 PM

Then the instance variable MapView has not been instantiated. In other words, there is no instance of MapView in memory.

#5 sausage

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Posted 08 February 2009 - 03:55 PM

Oh, gotcha, thanks, I got it working :-) is there any way to decrease the width of the columns, I'm trying to rebuild the map of my RPG in the table but the symbols are so spread out
If I'm posting, I probably have something horribly wrong with my computer, there's no obvious explanation for it, that's just the way it is.




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