Generating a Random Number between 1 and 10 Java?
max
min
random.nextInt(max - min + 1) + min
As the documentation says, this method call returns "a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive)". This means that you will get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number.
Generating a Random Number between 1 and 10 Java?
/**
* Returns a psuedo-random number between min and max, inclusive.
* The difference between min and max can be at most
* <code>Integer.MAX_VALUE - 1</code>.
*
* @param min Minimim value
* @param max Maximim value. Must be greater than min.
* @return Integer between min and max, inclusive.
* @see java.util.Random#nextInt(int)
*/
public static int randInt(int min, int max) {
// Usually this can be a field rather than a method variable
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((max - min) + 1) + min;
return randomNum;
}
As explained by Aurund, Random objects created within a short time of each other will tend to produce similar output, so it would be a good idea to keep the created Random object as a field, rather than in the method as I have done (for explanation purposes only).
Random rand = new Random(); I would go so far as to say that it must be a field. Random objects created within a short time of each other will tend to produce similar output. So many calls to randInt within a short period of time will not give evenly distributed output.
The standard way to do this is as follows:
Generating a Random Number between 1 and 10 Java?
max
min
random.nextInt(max - min + 1) + min
As the documentation says, this method call returns "a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive)". This means that you will get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number.
Generating a Random Number between 1 and 10 Java?
/**
* Returns a psuedo-random number between min and max, inclusive.
* The difference between min and max can be at most
* <code>Integer.MAX_VALUE - 1</code>.
*
* @param min Minimim value
* @param max Maximim value. Must be greater than min.
* @return Integer between min and max, inclusive.
* @see java.util.Random#nextInt(int)
*/
public static int randInt(int min, int max) {
// Usually this can be a field rather than a method variable
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((max - min) + 1) + min;
return randomNum;
}
As explained by Aurund, Random objects created within a short time of each other will tend to produce similar output, so it would be a good idea to keep the created Random object as a field, rather than in the method as I have done (for explanation purposes only).
Random rand = new Random(); I would go so far as to say that it must be a field. Random objects created within a short time of each other will tend to produce similar output. So many calls to randInt within a short period of time will not give evenly distributed output.
The standard way to do this is as follows:
Generating a Random Number between 1 and 10 Java?
Random rn = new Random();
for(int i =0; i < 100; i++)
{
int answer = rn.nextInt(10) + 1;
System.out.println(answer);
}
import java.util.Random;
Random rn = new Random();
for(int i =0; i < 100; i++)
{
int answer = rn.nextInt(10) + 1;
System.out.println(answer);
}
import java.util.Random;
Also if you change the number in parenthesis it will create a random number from 0 to that number -1 (unless you add one of course like you have then it will be from 1 to the number you've entered).
This will work for generating a number 1 - 10. Make sure you import Random at the top of your code.
why is this i < 100 inside parenthesis of for? It should be 10
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