Dynamically remove and add element into the JCOmboBox

Hi all ,
I have one JComboBox .
and I have 3 sets of values in vector form -- Vector<String> v1 , Vector<String> v2 , Vector<String> v3 .
Depending on certain condtion I have set the values in the JComboBox .
Can any body tell how can I achieve this
Thanks and regards
Anshuman Srivastava

Replace the model.
[http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html]

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In my code below I would like to add two buttons and by clicking on a button("Remove") it will remove one by one plotted data,and plot it back by clicking on the button("Add") such as the examples:
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Dynamically remove and add element into the JCOmboBox

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