Java color类

   private Color getNowColor(double hp, double maxhp){
  int colorR = 0;
  int colorG = 255;
  int colorB = 0;
  double hphalf = maxhp / 2;
  if(hp > hphalf){
  colorR = 255 - (int)((hp - hphalf) / (maxhp / 2) * 255);
  colorG = 255;
  }
  else{
  colorR = 255;
  colorG = (int) ( hp / (maxhp / 2 ) * 255 );
  }
  return new Color(colorR,colorG,colorB);
   }