Programming GPS and OpenStreetMap Applications with Java

1.4. Models in Physics 13

With two MassObjects

3

coded with the laws of gravity and force, creating

two mass objects is pretty straightforward:

class MassObject { double mass, position; }

For programmers familiar with procedural programming, this MassObject

is like a record set storing the mass’ attributes. The programming environ-

ment, where the objects are created for the actual simulation, is given by

the main(...) method. The two participating objects are created by

MassObject earth = new MassObject(5.98e24, 0 );

MassObject moon = new MassObject(7.35e22, 384404 );

Physics teaches that all masses are aware of each other—every mass

is interacting with ...