Something wrong, don't know what

Question

I'm trying to write a program that will put two(for now) circles in relation to each other in a certain way. (I'm using drawArc for a good reason, but won't get into that now). In the following code, r[ref] should result in 200, but it's resulting in 400. I did all the calculations by hand and can't see where the error is, so I'm assuming I got some syntax wrong somewhere or something. If this ends up just being a math check, I apoligize.:
import java.applet.Applet;
import java.awt.*;
import java.lang.*;
public class Bubbles2 extends Applet{
int t = 2;
double[] x = {200, 400};
double[] y = {500, 500};
double[] r = {200, 0};
public void paint(Graphics g) {
for(int p=0; p<=t-1; p++){
for (int ref=0; ref<=t-1; ref++) {
if (r[ref]==0 && r[p]>0) {
double diff = Math.sqrt(Math.pow((y[p]-y[ref]),2)+Math.pow((x[p]-x[ref]),2));
double angle2 = Math.asin((r[p]*.5)/diff);
double angle1 = 2*Math.PI/3-angle2;
if (r[p]>=diff) {
r[ref] = (int)((diff*Math.sin(angle1))/.5);
g.drawArc((int)(x[p]-r[p]), (int)(y[p]-r[p]), 2*(int)r[p], 2*(int)r[p], 0, 360);
g.drawArc((int)(x[ref]-r[ref]), (int)(y[ref]-r[ref]), 2*(int)r[ref], 2*(int)r[ref],0 ,360);
Matt

Answer 1

I dumped this into VisualAge for Java (just the calculations) and when it hit the line "r[ref] = ..." it had ref = 1 and r[1] = 400. Not 200, although it's still true that r[0] = 200. That was the first time that line was executed, I don't know what happens later.