Help with disabling close icon of last opened tab in JTabbedPane

Hello
Would someone help me out ? I have 3 tabs opened in a JTabbedPane, each with close icon "X". I am looking for a way to tell my program: if the user closes 2 tabs and only 1 remain, disable the close icon "X" of the last opened tab so that the user is unable to close the last tab. I have searched the forum, most I have run into are how to create the close icon. Would someone give me some insight into how to go about doing this? or if you have come across a forum that discusses this, do please post the link. Also, I am using java 1.6.
Thanks very much in advance

On each close, look how many tabs are remaining open in the JTabbedPane (getTabCount).
If there is only one left, set its close button to invisible. Something like this:
if (pane.getTabCount() == 1) {
TabCloseButton tcb = (TabCloseButton) pane.getTabComponentAt(0);
tcb.getBtClose().setVisible(false);
}

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