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JList setListData problem  RSS feed

 
Greenhorn
Posts: 5
Chrome Eclipse IDE Java
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Hi all,

I've a problem with 'refreshing' the JList. I"m using a Vector (which gets it's data from a database) to fill the JList and the JList is in a JScrollPane. I'm using a JFrame to show the JScrollPane.
My problem:
When I try to set the list data of the JList, it doesn't replace the list data which already was in the JList, but it just adds the new data (including the previous data) to the JList.
Here's an example.

JList showing the following data:
- One
- Two
- Three

Now, some new data is added to the Vector. I add 'four' to the vector. When I call JList.setListData(Vector) the JList shows this data:

- One
- Two
- Three
- One
- Two
- Three
- Four

I obviously only want the new data (one till four) and I want to get rid of the old data. Why doesn't the JList replace the previous data?

Hope someone can help me! (If you need my entire code, just leave a reply here. My code is very long, so I hope you don't need it )

Robin
 
Sheriff
Posts: 21503
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Chrome Eclipse IDE Java Spring Ubuntu VI Editor Windows
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Do you clear() the Vector before adding the new elements? If not it will keep everything you added until that time.
 
Robin Trietsch
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No, I don't clear the Vector before calling JList.setListData(). I'm going to try that tomorrow. Thanks for your reply, I think that's the solution!
 
Robin Trietsch
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It worked! I tried it this morning and that was the solution! Thanks,
Robin
 
Rob Spoor
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You're welcome.
 
It is sorta covered in the JavaRanch Style Guide.
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