求一个java程序:绘图程序包括画圆,椭圆,线,矩形,自定义。并且可以调图...答:rectangle = new Rectangle(currentX, beginY, beginX - currentX, currentY - beginY, color); } } else { if (currentY < beginY) { rectangle = new Rectangle(beginX, currentY, currentX - beginX, beginY - currentY, color); } else { rectangle = new Rectangle(beginX, beginY, currentX ...