Part 2 of my well-written series on Interpolation

while(System.nanoTime() - now < TIME_BETWEEN_UPDATES){
                    progress = (System.nanoTime() - now) / (double)TIME_BETWEEN_UPDATES;
                    repaint();
                    if(!(System.nanoTime() + TIME_BETWEEN_FRAMES >= lastUpdateTime + TIME_BETWEEN_UPDATES)){
                        try {
                            Thread.sleep(TIME_BETWEEN_FRAMES / 1000000);
                        } catch (InterruptedException e){ }
                    } else {
                        break;
                    }
                }