java - How to add multiple components to a JFrame? -

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i have jframe.

i have box class extends component. box class has paint method makes filled rectangle.

when add multiple of these box components jframe, added 1 displayed when call repaint on jframe.

i took @ layout managers, not sure that's want. want able make animation of whole bunch of rectangles wherever want on screen.

(i tried creating panel, adding panel jframe, , adding box components panel. did not work either).

thanks in advance!

you have 2 choices.

you can change layout of frame:

jframe frame; frame.setlayout(new flowlayout());

now, if add more 1 box, show on frame.

the other option said tried. (adding panel frame)

jpanel pane = new jpanel(); frame.add(pane); (add boxes 'pane')

also, should careful sizing of box. want call setpreferredsize() somewhere in creation of box. tell java size make box when added layout.

you should take @ java layout manager tutorials. there lots of great info there.

and, 1 more thing. reason 1 box @ time being displayed on frame because jframe's layout manager borderlayout. and, when call add on component has borderlayout, component automatically added center of component. subsequent calls add overwrite center component, leaving 1 component in middle.


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