JFrame centered on the screen

[palmis]

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

Palmis

 

[Thomas Fritsch]

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).

 

[Knute Johnson]

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

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


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

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

 

[Roedy Green]

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

 

[palmis]

Thank you very much.
palmis