The keyword super represents the parent class object. To demonstrate its usage, let's create a programming model of a vehicle, a truck, and a car. Let's start with a vehicle. The class that models it calculates the speed of the vehicle it can reach in a specified period of time, in seconds. It looks as follows:
public class Vehicle { private int weightPounds, horsePower; public Vehicle(int weightPounds, int horsePower) { this.weightPounds = weightPounds; this.horsePower = horsePower; } protected int getWeightPounds(){ return this.weightPounds; } protected double getSpeedMph(double timeSec, int weightPounds){ double v = 2.0 * this.horsePower * 746 * timeSec * 32.174 / weightPounds; return Math.round(Math.sqrt
