How to generate two whole Randoms in Java

The method Random.nextInt (n) provide what you need, you can use it this way:

int aleatoreo(int vMin, vMax) {
   Random r = new Random();
   return vMin + r.nextInt(vMax - vMin + 1);
}

System.out.println(aleatorio(0,25));

It will generate a pseudo-random number between [ vMin , vMax ] or [ 0 , 25 ] in the example.

This method can help you;

public static int generarAleatorio(int min, int max){
    Random random = new Random();
    return random.nextInt(max-min+1)+min;
}

The first parameter min being the number from where you want to start and max the end.

I edit the answer according to the author's comments:

package numeros_aleatorios_enteros;

import java.util.Random;


public class Numeros_aleatorios_enteros {

    public static void main(String[] args) {

        System.out.println(generarAleatorio(1, 25));       

    }
    public static int generarAleatorio(int min, int max){
        Random random = new Random();
        return random.nextInt(max-min+1)+min;
}

}

I just wanted to point out two things, since it would be convenient to have a function to do this operation.

Then I put a response by applying the two points mentioned. In this case, the returned value will be Random when the value of -1 is greater than the value of min . This can be changed, depending on the use that is going to be given to the method.

Code:

VIEW DEMO IN REXTESTER

import java.util.Random;

class Rextester
{  
    public static void main(String args[])
    {
        System.out.println(getRandomInRange(0, 25));        
        System.out.println(getRandomInRange(250, 25));        
        System.out.println(getRandomInRange(1, 25));        
        System.out.println(getRandomInRange(0, 88));        
        System.out.println(getRandomInRange(1, 88));        

        /*Prueba controlando si min es mayor que max*/

        int myRandom=getRandomInRange(50, 25);
        if (myRandom==-1){
            System.out.println("No se puedo generar un random");        
        }else{
            System.out.println("Random generado: "+myRandom); 
        }
    }

    /*Función que se podría incorporar a una clase utilitaria*/
    private static int getRandomInRange (int min, int max) {
        int rValue = -1;
        if (max>min) {
            Random r = new Random();
            rValue= r.ints(min, (max + 1)).limit(1).findFirst().getAsInt();
       }
        return rValue;
    }
}

Result:

17
-1
12
19
54
No se puedo generar un random