common components for game

hey guys i'm just asking this silly question, what are the components that you guys use when you were making a game.
basically the game has some dialog box, menu buttons, your character, grids, boxes, lifebar, and something like that...
oh and another thing, how can you make an layered image? :rolleyes: thanks guys for your answer.

To make a layered image, you can draw onto the graphics context of a BufferedImage using colors with an alpha value.

As far as components of a game go, almost every game has a main menu an exit button, and option buttons as a minimum. But it really depends. A simple board game might not even have a menu.