public abstract void drawRoundRect (int x, int y, int width, int height, int arcWidth, int arcHeight)

Draws an outlined round-cornered rectangle using this graphics context's current color. The left and right edges of the rectangle are at x and x + width, respectively. The top and bottom edges of the rectangle are at y and y + height.

Parameters:
x    the x coordinate of the rectangle to be drawn.
y    the y coordinate of the rectangle to be drawn.
width    the width of the rectangle to be drawn.
height    the height of the rectangle to be drawn.
arcWidth    the horizontal diameter of the arc at the four corners.
arcHeight    the vertical diameter of the arc at the four corners.

See also:
java.awt.Graphics.fillRoundRect