PPT Slide
// Draw a line from point (x1,y1) to
(int x1, int y1, int x2, int y2)
Comment: explains precisely what the method is to do. Written as a command to do it.
Some prefix modifiers (public and void) --explained later
The name of the method: drawLine.
The parameters: x1, y1, x2, y2 (along with their types (int)).