LWJGL using OpenGL to create circles

[adamtyping]

Hi and thank you for a great library!

I am having issues creating a circle.

When I use glBegin or any of the gl calls i get:

Example using: 'gl.glBegin(GL.GL_TRIANGLES);':
'GL_TRIANGLES cannot be resolved or is not a field'

Example using: 'gl.glVertex2d(center.x, center.y);':
'The method glVertex2d(int, int) is undefined for the type GL'

I'm sorry for the noobness but thank you for your help!

If you need me to post any other of my code i would be happy to, and thank you for any info you can provide me!