Do you mean org.eclipse.swt.widgets.TabFolder (CTabFolder)?
If yes, add an eventlistener to your TabFolder (CTabFolder object
tabFolder.addSelectionListener(new SelectionAdapter() { public void widgetSelected(org.eclipse.swt.events.SelectionEvent event) { tabFolder.getSelection()[0];
If you just have javax.swing.JTabbedPane called
yourJTabbedPaneVariableName.getSelectedIndex()
gives you the index of the selected tab
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