Using a.draw ( Confused )

//code
boolean[] ba = {true, false, true, false, false};
// code
for (int i=0; i<ba.length; i++) {
               Color c = Color.black;
               if(ba) c = Color.cyan;
               ACircle a = new ACircle(c, (i+1)*10, 5);
               a.draw();
The above computation.
1. Isn't It only suppose to draw 4 circles? I learned that it has 5 circles
2. There is an error says "Cannot find symbol class" ACircle
How do you explain?
Thanks :)

import java.awt.*;
class TestCircle {
     public static void main(String[] args) {
          boolean[] ba = {true, false, true, false, false};
          for (int i=0; i<ba.length; i++) {
               Color c = Color.black;
               if(ba) c = Color.cyan;
               ACircle a = new ACircle(c, (i+1)*10, 5);
               a.draw();
That was actually a sample I try to compute the error was
Cannot find symbol class ACircle
The rest I understood.

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