public class Velocity { private double deltaX; private double deltaY; //DefaultConstructor intializes velocity to 0 public Velocity(){ deltaX = 0; deltaY = 0; } public Velocity(double dX, double dY){ deltaX = dX; deltaY = dY; } public double getDX(){ return deltaX; } public double getDY(){ return deltaY; } public void setDX(double dX){ deltaX = dX; } public void setDY(double dY){ deltaY = dY; } public void setVelocity(double dX, double dY){ deltaX = dX; deltaY = dY; } }