JFrame centered on the screen

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palmis - 19 Jan 2006 16:11 GMT

How can I create a JFrame that is centered on the
screen?
It appear up on the left corner of screen. Why?

Palmis

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Thomas Fritsch - 19 Jan 2006 16:30 GMT

> How can I create a JFrame that is centered on the
> screen?

JFrame frame = ...;
frame.setLocationRelativeTo(null);

See the API doc of java.awt.Window#setLocationRelativeTo.
JFrame inherits that method from java.awt.Window.

> It appear up on the left corner of screen. Why?

Because the default position of a JFrame is (0,0).

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Knute Johnson - 19 Jan 2006 17:02 GMT

>> How can I create a JFrame that is centered on the
>> screen?
[quoted text clipped - 8 lines]
>
> Because the default position of a JFrame is (0,0).

And remember that you have to pack or size it before you call
setLocationRelativeTo().

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Knute Johnson
email s/nospam/knute/

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Roedy Green - 19 Jan 2006 17:13 GMT

>How can I create a JFrame that is centered on the
>screen?
>It appear up on the left corner of screen. Why?

see http://mindprod.com/jgloss/coordinates.html

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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palmis - 23 Jan 2006 08:48 GMT

Thank you very much.
palmis