java小船运动游戏：绘制图形界面，设置初始时的三个点，小船由其中一点依次运动到第三个点，然后又以正弦曲线的运动路径向某一方向运动！-java boat sports games: draw a graphical interface, set the initial three points, the boat turn movement to the third point by one point, and then again the the sinusoidal motion path