Question

Look at the gray circles along the lines, they need to be placed equally to represent the hours, here is my code for that, where did I go wrong?

for (int i=0; i<12; i++)
    {
        c.drawCircle(140*(float)Math.cos((double) (i*30))+ width/2,
                     140*(float) Math.sin((double) (i*30)) + height/2,  1,  p);
    }

Answer 1

The angle must be provided to Math.cos in radians (between 0 and 2*Math.PI).

So, instead of

Math.cos((double) (i*30))

Use

Math.cos(i*Math.PI/6.0)

Note that I also removed the useless cast to double : multiplying an int and a double already produces a double.