个人原创代码：编写Java Application程序，有一个三角形类Triangle，成员变量有底边x和另一条边y，和两边的夹角a（0<a<180），a为静态成员，成员方法有两个：求面积s（无参数）和修改角度（参数为角度）,构造函数为 Triangle(int xx,int yy,int aa) 参数分别为x,y,a赋值 在main方法中构造两个对象，求出其面积，然后使用修改角度的方法，修改两边的夹角，再求出面积值。(提示：求高的方法 h=y*Math.sin(a)).-The original code of the individual: to write a java application program, a triangle of the Triangle, the member variable bottom edge of the x and an edge y, and both sides of the angle a (0 <a <180), a static member, a member of two: find the area s (without parameters) and to modify the angle (angle parameters), the constructor of the Triangle (int xx, int, yy, int aa), the parameters x, y, and a assignment construct two objects in the main methodcalculate the area, then use the method to modify the angle, modify the angle on both sides, and then calculate the area of ​　​　value. (Hint: pursue high h = y * Math.sin (a)).