CODEWITHSUNDEEP
javarandom
Thedudxo
Thedudxo

Reputation: 591

random integers between 2 values

I'm new to programming java and i need to make random integers between 2 values. I could not find any relevant info in the oracle tutorials.

because i'm new to java, most of what i researched i don't understand. I have looked at the following:

http://docs.oracle.com/javase/7/docs/api/java/util/Random.html

Generating a Random Number between 1 and 10 Java

http://www.javapractices.com/topic/TopicAction.do?Id=62

How do I generate random integers within a specific range in Java?

Getting random numbers in Java

i have tried:

import java.util.Random;

public static void main(String[] args) {
    Random randint = new Random();
    System.out.println(randint);

result:

java.util.Random@52e922

it appears to be printing the type of randint.

so, how do i create a random integer between 2 values, and then print the result to the screen?

Upvotes: 2

Views: 16582

Answers (5)

beginner
beginner

Reputation: 21

It functions to me, the possible results includes the max value but not the min.

int random = (int)(Math.random() * (max - min) + 1) + min

Upvotes: 0

Bu Saeed
Bu Saeed

Reputation: 1337

You can specify the range of the random number like this:

Random random = new Random();
int min = 2;
int max = 5;
int x = random.nextInt((max-min)+1) + min;

The number that will be generated will be between 2 and 5.

If you do not need to specify any range then you can do it like this:

Random random = new Random();
int x = random.nextInt(11);

Note that the random number in this example will be between 0 and 10.

In either case, You will need to include the following import statement to your program as long as you want to use the Random class.

import java.util.Random;

Upvotes: 1

EDToaster
EDToaster

Reputation: 3180

If you want a value between two integer values (min and max) Here you go:

Random r = new Random();
int randInt = r.nextInt(max-min) + min;
System.out.println(randInt);

So max would be 5 and min would be 2 if you want a integer between 2 and 5

Upvotes: 4

TLP
TLP

Reputation: 67900

You are printing the Random object. You need to use a function of the object to get a random integer:

Random random = new Random();
int i = random.nextInt(2);
System.out.println("Random value: " + i);

Upvotes: 0

Spiked Penguin
Spiked Penguin

Reputation: 27

You need to make a int or something to store them in

Random randint = new Random();
int a = randint.nextInt(2)+1;
System.out.print(a);

Do note however I use +1 because java always counts from 0. So this will produce 1 or 2.

Upvotes: 0

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