class Car {
String licensePlate; // e.g. "New York 543 A23"
double speed; // in kilometers per hour
double maxSpeed; // in kilometers per hour
}
Once you've constructed a car, you want to do something with it. To
access the fields of the car you use the .
separator.
The Car
class has three fields
licensePlate
speed
maxSpeed
Therefore if c
is a Car
object,
c
has three fields as well:
c.licensePlate
c.speed
c.maxSpeed
You use these just like you'd use any other variables of the same type. For instance:
Car c = new Car();
c.licensePlate = "New York A45 636";
c.speed = 70.0;
c.maxSpeed = 123.45;
System.out.println(c.licensePlate + " is moving at " + c.speed +
"kilometers per hour.");
The .
separator selects a specific member of a
Car
object by name.