(1) Point2D有两个整型成员变量x, y (分别为二维空间的X,Y方向坐标),Point2D的构造方法要实现对其成员变量x, y的初始化。 (2)Point2D有一个void型成员方法offset(int a, int b),它可以实现Point2D的平移。 (3)Point3D是Point2D的直接子类,它有有三个整型成员变量x,y,z (分别为三维空间的X,Y,Z方向...
Point3D p3 = new Point3D(4,4,4);p3.offset(4,2,3);//可以进行移动 Point3D p4 = new Point3D(5,5,5);System.out.println("p1和p2之间的距离为：");System.out.println(new Point2D().distan(p1,p2));System.out.println("p3和p4间的距离为：");System.out.println(new Point3...
p1.offset(3, 3);Point2D p2 = new Point2D(2,2);Point3D p3 = new Point3D(4,4,4);p3.offset(4,2,3);//可以进行移动 Point3D p4 = new Point3D(5,5,5);System.out.println("p1和p2之间的距离为：");System.out.println(new Point2D().distan(p1,p2));System.out.println...