Vaadin ComboBox

This could be very basic . I am using vaadin comboBox component and loading values dynamically from a property file like below


and injecting the values using spring @Value annotation
private List st;

ComboBox testType= new ComboBox(“Types”);

the above code works fine. But now I want to add caption to each of the values like
for combobox item ‘one’ the display value should be ONE, for ‘two’ display value should be TWO. anyone knows how to achieve this?

Thanks in advance