Handle forward & backward TAB

In the focusLost() event of a component, I need to find if focus has to be set to the next component or to the previous component. Basically identify if TAB or SHIFT+TAB was pressed.
How can this be done within the focusLost() event of the component.

I've added a keyListener to all the components within the panel. The components are radio buttons.
But still, none of the key events are fired when TAB is pressed.
Also I've added the focusListener to each of the component. In the focusLost event I'm setting the focus to the next component outside this panel. This is what I need to change. In the focusLost, I need to determine if focus is to be set to the next component or the previous component.

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