I want to return meaningful numbers with Math.random()

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Java: generating random number in a range

I am using Math.random() in java. But always it returns less than 0. Such as 0.4454590405954

Is there a way to return meaningful numbers as what i want.

For example i want to return numbers which values are 0 to 100. How i can do it?

if i multiply the number, result will a double number. but i want to generate integer type number. — hakiko, Apr 19 '12 at 16:12
Dup of [Java: generating random number in a range](http://stackoverflow.com/questions/363681/java-generating-random-number-in-a-range) (I mis-cast my close vote) — Matt Ball, Apr 19 '12 at 16:13

score 2 · Answer 1 · answered Apr 19 '12 at 16:11

2

You can use Random.nextInt(int n) object to return int 0 - 100

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

For example

Random random = new Random();
int myRandom = random.nextInt(101);
// do magic

answered Apr 19 '12 at 16:11

Pau Kiat Wee

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can you show a little code example? – hakiko Apr 19 '12 at 16:14
3

@hakiko are you serious? Re-read the answer. – Matt Ball Apr 19 '12 at 16:15
@ok i understand now. thanks. i'm new at java :) – hakiko Apr 19 '12 at 16:20

score 2 · Answer 2 · answered Apr 19 '12 at 16:13

2

Use the following to get an integer from 0 to 100:

Random r = new Random();
int x = r.nextInt(101); // from 0 (inclusive) to 101 (exclusive)

answered Apr 19 '12 at 16:13

Michael Schmeißer

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I want to return meaningful numbers with Math.random()

2 Answers2