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Generating Random Number

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This section shows you how to create a random number and example provided here will help you easily understand and use the code to generate random numbers in your java application.

Generating Random Number

     

In many places you need random numbers to fulfill your requirements. Java provides classes to help you in generation random numbers for your application. Random Number is the frequently used to generate numbers either in the range or without specifying a range. 

This section shows you how to create a random number and example provided here will help you easily understand and use the code to generate random numbers in your java application.

The Random class of java.util package can be used to generate a random number in the range which can be specified. If you don't mention the range value then program will generate any random number for your. 

Methods and APIs Explanation:

Random:
Random is the class of java.util.*; package. This class is used to create a random number through it's created object using the 48-bit seed which is modified by the linear congruential formula.

nextInt():
This method returns a random number in random number generator's sequence. If you pass a value to the method then the method return the random number in the mentioned range otherwise it will generate the random number in sequence according to the random number generator.

Here is the code of the program:

import java.util.*;

public class GenerateRandomNumber{
  public static void main(String[] args){
  Random rand = new Random();
  int num = rand.nextInt(10);
  System.out.println("Generated Random Number between 0 to 10 is : " + num);
  int numNoRange = rand.nextInt();
  System.out.println("Generated Random Number 
without specifying any range is : " 
+ numNoRange);
  }
}

Download this example.

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Posted on: April 16, 2007

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Comments:6
Antra
May 25, 2011
servlet

Good job
vivek yadav
January 14, 2012
java

Thanks mate
patel jignesh
January 28, 2012
java

this is very nice for learning some new. this is very useful.
Darren Brown
January 29, 2012
multiple random numbers generated

need to find a solution to a combination of 2 numbers 1/2, 1/3 , 1/4 up to 21/22 randomly selected out of 231 combinations - any thoughts - darren
pavan
June 5, 2014
how to select random questions from list?

how to select random questions from list?
lokanadham
April 5, 2013
plz write program sir

1.write a c program to find top (biggest) 6 numbers given by user until he provide the keyword 'z'. eg:123 142 12458 54 147 25 3687 9999 1452 101 5 9 145 until user 'z'.
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