Basic Random Rolling Dice Java

Question

I am trying to write a method rollDice(int number, int nSides) which returns the total result of rolling the number dice with nSides sides.

So for example rollDice(3

Answer 1

Random.nextInt() has unpredicable behaviour - it can produce all values possible for an integer, including negative numbers. Use Random.nextInt(numSides) instead - it will return an integer from [0,numSides) i.e. including 0 and excluding numSides. To get your desired functionality [1,numSides] use

r.nextInt(numSides)+1;

See here for more information.