Getting random numbers in Java between two numbers

Question

I would like to get a random value between 65 to 122.

How may I do that with the help of Math.random(); in Java?

Is there any way to bound the values that will be accepted?

Googling the question title gives a great answer in the very first link. This should get downvoted into oblivion for "Lack of research effort" — Ordous, Sep 04 '14 at 11:56

score 1 · Answer 1 · answered Sep 04 '14 at 11:53

1

Since Math.random() returns a number between 0 and 1 you can use a type like:

double d = 65 + Math.random()*(122-65);

answered Sep 04 '14 at 11:53

Eypros

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score 1 · Accepted Answer · answered Sep 04 '14 at 11:53

The static method Math.random() returns a number between 0 and 1 so you just have to multiply the result with the difference between you minimal and maximal value and add this to your minimal value.

int min = 65;
int max = 122;
int random = (int) min + (max - min) * Math.random();

Getting random numbers in Java between two numbers

2 Answers2