验证多个jcombobox项目选择的最佳方法是什么？

What is the best way to verify if a specific combination of two symbols is already selected in a several couples of jcomboboxes? This question is refered to a situation in which I have e. g. 10 options and for each of those I can assign a combination of two symbols where first one is from [ALT, CTRL, SHIFT] vector and second one is from [letters and numbers] vector. Both vectors are visualized in JComboBoxes (for each option are two combo boxes). What is the best way to verify if a specific co