Question

What method returns a random int between a min and max? Or does no such method exist?

What I’m looking for is something like this:

NAMEOFMETHOD (min, max) 

(where min and max are ints), that returns something like this:

8

(randomly)

If such a method does exist could you please link to the relevant documentation with your answer.

Thanks.

---

UPDATE

Attempting to implement the full solution and I get the following error message:

class TestR
{
    public static void main (String[]arg) 
    {   
        Random random = new Random() ;
        int randomNumber = random.nextInt(5) + 2;
        System.out.println (randomNumber) ; 
    } 
} 

I’m still getting the same errors from the compiler:

TestR.java:5: cannot find symbol
symbol  : class Random
location: class TestR
        Random random = new Random() ;
        ^
TestR.java:5: cannot find symbol
symbol  : class Random
location: class TestR
        Random random = new Random() ;
                            ^
TestR.java:6: operator + cannot be applied to Random.nextInt,int
        int randomNumber = random.nextInt(5) + 2;
                                         ^
TestR.java:6: incompatible types
found   : <nulltype>
required: int
        int randomNumber = random.nextInt(5) + 2;
                                             ^
4 errors

What’s going wrong here?

Answer 1

Construct a Random object at application startup:

Random random = new Random();

Then use Random.nextInt(int):

int randomNumber = random.nextInt(max + 1 - min) + min;

Note that the both lower and upper limits are inclusive.