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Tip of the Day
Language: Java
Expertise: Intermediate
Jan 15, 2018



Application Security Testing: An Integral Part of DevOps

Random Number Generation Using Java

We can use the Random class available in the java.util package to generate random numbers. The code sample below demonstrates generation of a random number with an upper limit.

Listing 1. Random Number Generation

import java.util.*; 

class RandomNumberGenerator 
   public static void main (String args[]) 
      RandomNumberGenerator randomNumberGenerator = new RandomNumberGenerator();
   private void proceed()
      System.out.println("Enter the upper range for the random number: ");
      Scanner scanner = new Scanner(System.in);
      int maxRange = scanner.nextInt(); // Likely to throw java.util.InputMismatchException when incorrect inputs are provided. 
                                // There are similar methods to support other data types
      Random random = new Random(); 
      int randonInt = random.nextInt(maxRange); //Generate a randon number 0 to maxRange-1
M S Sridhar
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