Cautionary Note: Mixing Types

• Avoid mixing light and heavy weight components.

• Heavy weights are “opaque” -- solid & rectangular

• Light weights are transparent, and draw themselves on top of the heavyweight container they occupy (Frame, Jframe, Panel, etc.)

• This can frustrate Z-order layering:

As designed,

and as we coded it

What shows up

Heavy weight

java.awt.Button

Lightweight

java.awt.Component

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