Generate n random numbers whose sum is m and all numbers should be greater than zero

Question

I want to generate 9 non zero random numbers whose sum is 250. I have tried following code it gives me 9 random numbers but some numbers are zero.

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Answer 1

//Perl code translated to Java
//Its working and no 0's !!!!

import java.util.*;
import java.util.stream.*;enter code here

public class MyClass {
    public static void main(String args[]) {
     int numberOfDraws = 17;
     int targetSum = 40;
     


Random r = new Random();


List load = new ArrayList<>();



int sum = 0;
for (int i = 0; i < numberOfDraws; i++) {
        int next = r.nextInt(targetSum) + 1;
        load.add(next);
        sum += next;
        System.out.println("Arraylist first loop " + load.get(i));
    }
    
    
double factor = (((double)targetSum)-((double)numberOfDraws)) / ((double)sum);
System.out.println("Factor value: " + factor);

int newSum =0;
for (int i = 0; i < numberOfDraws; i++) {
    load.set(i, (int) ((load.get(i) * factor)) + 1);
    newSum += load.get(i);
    
    System.out.println("Arraylist second loop " + load.get(i));
}



int fudge = targetSum - newSum;
for (int i = 0; i < fudge; i++) {

   
   int y = r.nextInt(numberOfDraws);
        load.set(i, load.get(i) + 1);
   
}

System.out.println("Random arraylist " + load);

    }
    }