طلب مساعدة : how to resize the components in the window

Hello friends,
I am new to swing . Can anyone help me as to how to resize the components in the window(Textboxes, labels, buttons) with the change in the size of the original window?? I mean the user can change the size of the window using mouse and accordingly i want to change the size of the components inside it . Can anyone please help me with a sample code