Java question

[namarino]

Hi guys! I have this little lab to do for computer science class but I'm having trouble. I admit that during the class that my teacher explained this, I wasn't paying attention, but all he went over is how to use the math class that is included in the java library so I could look that up and how to use it. I was wondering if someone could just explain to me that second paragraph. I don't quite understand how instance variables play a roll in making a random number generator. Wouldn't you just make a method that generates the number and takes input and then just reference it in the main method? I'm not looking for anyone to do it for me, I just want someone to essentially help me to understand that second paragraph and how instance variables would come into play in a case like this. Thanks guys.

[Project37]

I think this is what he wants

 

public class DiceRoller {

 

private int rolledNumber; // field that construtor will set

 

public DiceRoller(int dice, int sides) {

// make random

Random random = new Random(35);

set instance variable with method

this.rolledNumber = rollEm(dice, sides);

}

 

//method to randomize roll

//can be private since we only need the contructor to use it.

 

private int rollEm(int dice, int sides) {

// this method is where the magic happens, 

// i will leave that up to you

int total = dice * sides; // not actual way to get rolling

return total;

}

[Project37]

I think what he means is the constructor will set the field using a random number generator and a method.

 

Edit:

You will need a getter to grab the total after or make the field public(not recommended)