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();      randomNumberGenerator.proceed();   }      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      System.out.println(randonInt);    }}