Constructors

Here's the complete class:

class Car {

  String licensePlate; // e.g. "New York A456 324"
  double speed;        // kilometers per hour
  double maxSpeed;     // kilometers per hour
  
  Car(String licensePlate, double maxSpeed) {

    this.licensePlate = licensePlate; 
    this.speed  = 0.0;
    if (maxSpeed > 0) this.maxSpeed = maxSpeed;
    else this.maxSpeed = 0.0;
    
  }

  // getter (accessor) methods
  String getLicensePlate() {
    return this.licensePlate;
  }

  double getMaxSpeed() {
    return this.maxSpeed;
  }

  double getSpeed() {
    return this.speed;
  }

  // accelerate to maximum speed
  // put the pedal to the metal
  void floorIt() {
    this.speed = this.maxSpeed;  
  }
  
  void accelerate(double deltaV) {

     this.speed = this.speed + deltaV;
     if (this.speed > this.maxSpeed) {
       this.speed = this.maxSpeed; 
     }
     if (this.speed <  0.0) {
       this.speed = 0.0; 
     }     
     
  }
  
}

Notice that I've taken out several things:

• the initialization of the fields
• the setter methods