A good answer might be:

class myFrame extends Frame
{
  public void paint ( Graphics g )
  {
    g.drawString("Hello", 0, 50);
  }

}

To be precise you must adjust the starting coordinates based on the size of the characters in "Hello". Also, the size of the drawing area includes the borders and the top bar of the frame. To get "Hello" in the center of the remaining area you must account for those borders. All this can be done, but let's not.