refresh JFrame after adding new Components

Question

I want to add some new Components to my JFrame during runtime when a button is pressed. This works so far, but i have to resize the window manually to see the new components.

Is there any Action I can fire or a method to call to refresh the window? Any help appreciated. Thanks in advance.

score 43 · Accepted Answer · edited Jan 21 '13 at 23:45

43

You have to revalidate(); the frame. If that doesn't work you also have to call repaint();

edited Jan 21 '13 at 23:45

Mikhail

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answered Sep 15 '10 at 14:16

crusam

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ok had to hack a little bit arround in my classes but it works! (btw you did mean validate() right? ;)) – reox Sep 15 '10 at 14:26
indeed, since JFrame is already a top level container, you just can call validate();. – crusam Sep 15 '10 at 14:54
Well, generally components are added to a JPanel, not the frame directly, so you would revalidate the panel. – camickr Sep 15 '10 at 15:33
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repaint works and revalidate does not - any idea why? – Rarw May 14 '14 at 18:07

score 9 · Answer 2 · answered Sep 15 '10 at 14:20

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Call

revalidate();
repaint();

revalidate tells the layout manager to reset based on the new component list. This will also trigger a call to repaint.

repaint is used to tell a component to repaint itself.

answered Sep 15 '10 at 14:20

dogbane

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score 0 · Answer 3 · answered Aug 01 '17 at 13:47

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in java repaint(); working for me. while revalidate(); not working for me.

answered Aug 01 '17 at 13:47

A.YULGHUN

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refresh JFrame after adding new Components

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