[Djur]

Originally Posted by 2185Bilal

Wow..thank you very much. And what was the thing you told me about the "final"

ps. I pretty new to Java, and i think "final" is like a variable type (string, integer), so could you please tell what is a final.

Thanks

"final" is a modifier to a variable or Object (variables being integers, doubles; Objects being Strings, Jaguars, Joysticks, etc). If you put "final" in front of a variable/Object, that means that it cannot be changed by any method in any class of your code. Basically, "final" means "constant."

For example:

Jaguar jaguar = new Jaguar(1);
jagaur = new Jaguar(2);

void changeJag(){
    jaguar = new Jaguar(3);
}

A non-final object can be reassigned values, like I showed above. The Jaguar is not "final," so you can change it's value anywhere in your code.

final Jaguar jaguar = new Jaguar(1);
jaguar = new Jaguar(2);

void changeJag(){
    jaguar = new Jaguar(3);
}

The above code will throw an error while compiling because the Jaguar object is declared "final." If you declare an object "final," it cannot be assigned a new value. Declaring your objects "final" means that you do not want them to have values other than the ones you give them. For example, if you have a Jaguar controlling your front-left wheel, you do not want to give it a new value in the code so that your robot thinks that your front-left wheel is the rear-left wheel.