程序代码：

class PointTect{
  public static void main(String[]args){
    Point P=new Point();
    P.SetPoint(4,5);
    P.printInfo();
  }
}
class Point{
  int x=2;
  int y=3;
}
void SetPoint(int a,int b){
   x=a;
   y=b;
}
void printInfo(){
  System.out.println("("+x+","+y+")");
}