Forward-Euler Method

Question

I'm doing an experimental program. I need to find elevation from a set of experimental data. I record only time and acceleration data and I used Forward Euler Method to solve the double integration. The code that I wrote is this.

public void forward_method(double[] acceleration, double[] time){
    double deltaT = time[1] - time[0];
    double velocity[] = new double[time.length];
    double displacement[] = new double[time.lenght];

    velocity[0] = 0; 
    displacement[0] = 0;

   for(int i = 0; i < acceleration.length - 1; i++){
       velocity[i + 1] = velocity[i] * acceleration[i] * deltaT;
       displacement[i + 1] = displacement[i] * velocity[i] * deltaT;
   }
}

Is it correct for find velocity and displacement? How can I modify it to find elevation?

Answer 1

No, that is wrong. Correct would be

   velocity[i + 1] = velocity[i] + acceleration[i] * deltaT;
   displacement[i + 1] = displacement[i] + velocity[i] * deltaT;