Random number generator two digit

Question

package com.nusecond.Code;
import java.util.*;

public class Code {

    public static void main(String args[]){

        Random random=new Random();
        for(int j=10;j<=99;j++){        
           int num=random.nextInt(100) ;
           //ssLong i=System.currentTimeMillis();
           //String result = String.format("%04d", i % 10000);
           System.out.println("Code generated:"  +num);
        }
    }
}

I want to print two digit random numbers between 10 and 99.

Note : I want only one number every time I run the program.

"I want only one number" Why do you have a loop that runs from 10 to 99? That will give you 89 numbers between 0 and 99. — Arc676, Dec 22 '15 at 06:24
Possible duplicate of [Generating random integers in a range with Java](http://stackoverflow.com/questions/363681/generating-random-integers-in-a-range-with-java) — Haseeb Anser, Dec 22 '15 at 06:28
Simple. `random.nextInt(90) + 10 ;` will always give you a number between 10 and 99. — TheLostMind, Dec 22 '15 at 06:32

score 4 · Answer 1 · answered Dec 22 '15 at 06:33

4

With random numbers, if you need to start at a certain number, just add the random number to that lower limit. The upper limit passed to the random number will be the upper bounds minus the lower limit.

int num = random.nextInt(90) + 10;

answered Dec 22 '15 at 06:33

James Cootware

381
2
9

score 1 · Answer 2 · edited Dec 22 '15 at 07:05

You can use this method:

private static int showRandomInteger(int aStart, int aEnd, Random aRandom){
    if (aStart > aEnd) {
      throw new IllegalArgumentException("Start cannot exceed End.");
    }
    //get the range, casting to long to avoid overflow problems
    long range = (long)aEnd - (long)aStart + 1;
    // compute a fraction of the range, 0 <= frac < range
    long fraction = (long)(range * aRandom.nextDouble());
    int randomNumber =  (int)(fraction + aStart);    
    return randomNumber;
}

The parameters you have to pass to this method are:

aStart : your starting value(i.e. 10 in you case)
aEnd : your ending value(i.e 99 in your case)
aRandom : this would be an object of the Random class.(Random random=new Random();)

score 0 · Answer 3 · answered Dec 06 '17 at 12:50

0

Random random = new Random();

// generate a random integer from 10 to 90 i.e 2 digit random no.

int abc =  10+random.nextInt(90);

answered Dec 06 '17 at 12:50

Colthurling

75
1
1
7

dust · Answer 4 · 2022-10-08T13:43:41.737

0

java code to generate random two digit number.

    import java.util.*;

public class RandomNumbers{
        public static void main(String[] args){
                Random rand = new Random();
                int random=rand.nextInt(90)+10; //generates random no. between 10 and 100
                System.out.println(random);
        }
}

edited Oct 08 '22 at 13:43

answered Mar 18 '21 at 04:20

dust

171
1
5

Random number generator two digit

4 Answers4