jframe size can be set to screensize but the buttons and other things in jframe dont get modified according to the screensize

[a1n1n1a1]

i want to set the size of my jframe equal to the screensize of the monitor being used.I have thus used this:

Toolkit kit = Toolkit.getDefaultToolkit();
Dimension screenSize = kit.getScreenSize();
frame.setSize(screenSize);

the size of jframe fits the screen but the inner things of jframe e.g the buttons and textarea they are not modified according to the size and therefore some of my button appear half in the jframe and half are cut...Please help ...that the jframe should b such that when it is opened in any pc it should b of screensize with normal location of buttons and other things in it..