Generate a Random number between 1 and 10 in Java [3 ways]

In this post, I will be sharing how to generate a random number between 1 and 10 in Java. There are 3 ways to achieve our goal:

1. Using new Random().nextInt() method

2. Using Math.random() method

3. Using ThreadLocalRandom.current().nextInt() method

Read Also:  How to Shuffle a String in Java

Generate a random number between 1 and 10 in Java

1. Using new Random().nextInt()

We can easily generate a random number between 1(inclusive) and 10(inclusive) in Java using new Random().nextInt() method.

In short,

 Random random = new Random();
int randomNumber = min + random.nextInt(max);

where min = 1, max = 10.

Given below is the Java program to generate a random number between 1 and 10 using new  Random().nextInt() method.

 import java.util.Random;

public class GenerateRandomNumber {
    public static void main(String args[]) {
      int min = 1;
      int max = 10;
      System.out.println("Generating random number between 1 and 10 using new Random().nextInt() method");
      Random random = new Random();
      int randomNum = min + random.nextInt(max);
      System.out.println("Generated random number is:  " + randomNum);
    }
}

Output:
Generating random number between 1 and 10 using new Random().nextInt() method
Generated random number is: 8

2. Using Math.random()

We can also use Math.random() method to generate a random number between 1(inclusive) and 10(inclusive) in Java.

One liner is:

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

where, min = 1 and max = 10.

Given below is the Java program to generate a random number between 1 and 10 using Math.random() method.

 public class GenerateRandomNumber2 {
    public static void main(String args[]) {
      int min = 1;
      int max = 10;
      System.out.println("Generating random number between 1 and 10 using Math.random() method");
      int range = max - min;
      int randomNum = min + (int) (Math.random() * (range + 1));
      System.out.println("Generated random number is:  " + randomNum);
    }
}

Output:
Generating random number between 1 and 10 using Math.random() method
Generated random number is: 5

3. Using ThreadLocalRandom.current().nextInt()

We can also use ThreadLocalRandom.current().nextInt() method to generate a random number between 1(exclusive) and 10(inclusive) in Java.

One liner is:

 
int randomNum = min + ThreadLocalRandom.current().nextInt(min, max);

where, min = 1 and max = 10.

Given below is the Java program to generate a random number between 1 and 10 using ThreadLocalRandom.current().nextInt() method.

 import java.util.concurrent.*;
public class GenerateRandomNumber3 {
    public static void main(String args[]) {
      int min = 1;
      int max = 10;
      System.out.println("Generating random number between 1 and 10 using ThreadLocalRandom.current.nextInt() method");
      int randomNumber = min + ThreadLocalRandom.current().nextInt(min, max);
      System.out.println("Generated random number is:  " + randomNumber);
    }
}

Output:
Generating random number between 1 and 10 using ThreadLocalRandom.current.nextInt() method
Generated random number is: 10

That's all for today. Please mention in the comments if you have any questions related to how to generate a random number between 1 and 10 in Java.