Introduction - If you have any usage issues, please Google them yourself
Most of java on the graphics, text, images, methods of operation defined in the Graphics class, so the experimental methods such as the use of Color (int r, int g, int b), setColor (Color c), drawline (int x1 , int y1, int x2, int y2) are from the Graphics class, in addition to text and font handling is also used in the Font class of new Font ( Font name , font style, font size), setFont (Font f) and other methods