Increaing Randomly Generated Numbers

Question

I want to generate random integers such that the next generated number is always greater than the previous one.

Assume I start with 3, I want the next to be always greater than 3. And say I generated 5, I want the next to be greater than 5 and so on..

Is there a top limit or is the next number allowed to be 40,000,000 etc.? — RealSkeptic, Mar 06 '15 at 18:42
I would take a look here: http://stackoverflow.com/questions/363681/generating-random-integers-in-a-range-with-java — SimplyPanda, Mar 06 '15 at 18:43
What kind of randomness do you expect? Do you want each integer within the range to be selected with the same probability? Or you just need any increasing number sequences? — Eric, Mar 06 '15 at 19:59

score 4 · Answer 1 · answered Mar 06 '15 at 18:46

This should get you a number that is consistently larger than the previous value. The range is the maximum distance from the previous value that you want the number to be.

public getLargerRandom(int previousValue){
    int range = 100; //set to whatever range you want numbers to have

    return random.nextInt(range) + previousValue;

}

score 0 · Answer 2 · answered Mar 06 '15 at 18:44

0

int rnd = 0;
while (true) {
    rnd = ThreadLocalRandom.current().nextInt(rnd +1, Integer.MAX_INT);
    System.out.println("Next random: "+rnd);
}

answered Mar 06 '15 at 18:44

Uli

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CaffeineToCode · Answer 3 · 2015-03-06T18:51:21.747

0

You would store the randomly generated number as a variable, then use that as a minimum value for the next generation of numbers.

int x = 0;
x = new Random.nextInt(aNumber) + x;

edited Mar 06 '15 at 18:51

answered Mar 06 '15 at 18:45

CaffeineToCode

830
3
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score 0 · Answer 4 · answered Mar 06 '15 at 19:28

The following example generates a set of random numbers between a start value and a max value without going over the desired maximum number.

import java.util.Random;

public class RandomNumbers {
  public static void main(String[] args) {
    GetIncreasingInts(20, 3, 101);
    }

  public static void GetIncreasingInts(int numIntsToGet, int start, int max) {
    if (numIntsToGet > 0 && start >= 0 && max > 0) {
      Random random = new Random();
      int nextStart = start;
      int num = -1;

      for (int index = 0; index < numIntsToGet; index++) {
        if ((max - 1) <= nextStart)
          break;
        else {
          num = nextStart + random.nextInt(max - nextStart);
          nextStart = num;

          System.out.println("Number: " + num);
        }
      }
    }
  }
}

Increaing Randomly Generated Numbers

4 Answers4