After all the modifications made in this section, the Bicycle class is now:

public class Bicycle{
	
    private int cadence;
    private int gear;
    private int speed;
	
    private int id;
    
    private static int numberOfBicycles = 0;

	
    public Bicycle(int startCadence, int startSpeed, int startGear){
        gear = startGear;
        cadence = startCadence;
        speed = startSpeed;

        id = ++numberOfBicycles;
    }

    public int getID() {
        return id;
    }

    public static int getNumberOfBicycles() {
        return numberOfBicycles;
    }

    public int getCadence(){
        return cadence;
    }
	
    public void setCadence(int newValue){
        cadence = newValue;
    }
	
    public int getGear(){
    return gear;
    }
	
    public void setGear(int newValue){
        gear = newValue;
    }
	
    public int getSpeed(){
        return speed;
    }
	
    public void applyBrake(int decrement){
        speed -= decrement;
    }
	
    public void speedUp(int increment){
        speed += increment;
    }
	
}