String[] date = new String[6];
date[0] = String.valueOf(year());
date[1] = String.valueOf(month());
date[2] = String.valueOf(day());
date[3] = String.valueOf(hour());
date[4] = String.valueOf(minute());
date[5] = String.valueOf(second());
String joineddate = join(date, " ");
int dwidth = 600;
int dheight = 600;
float radiomax = 500;
int colorselector;
int nofcircles =234;
void setup() 
{
size(dwidth, dheight);
background (255);
noLoop();
}
void draw() 
{
  for (float loop = radiomax; loop >= 0 ; loop = loop - (radiomax /nofcircles))
  {
    colorselector = colorselector + 1;
    if (colorselector % 2 == 0)
    {fill (255);}
    else
    {fill (0);}
    noStroke();
    ellipse((dwidth/2), (dheight/2), loop, loop);}
    saveFrame(joineddate);
}

I do get some token error pointing to the [ in this: date[0] = String.valueOf(year());
If I run only this: 
String[] date = new String[6];
date[0] = String.valueOf(year());
date[1] = String.valueOf(month());
date[2] = String.valueOf(day());
date[3] = String.valueOf(hour());
date[4] = String.valueOf(minute());
date[5] = String.valueOf(second());
String joineddate = join(date, " ");

It runs alright.

I already tried this in Processing 2.0.1, 1.5.x and 1.2.x. and it gives the same results.
Thanks.