Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Implementation of Mersenne Twister in Java

Posted on 2006-07-06
6
779 Views
Last Modified: 2013-11-23
I'm having a few problems actually generating random numbers using a Java implementation of the Mersenne Twister Random Number Generator from (http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/VERSIONS/JAVA/MTRandom.java). I've only had 1 years wort of experience in Java so you might understand the problem. What I want to be able to do is actually generate a random number for my project comparing different Random Number Generators. For example, to generate a random number using Math.random( ) you would simply do the following:

double myVar = Math.random( );

Now, how would you do the same for the Mersenne Twister java implementation listed above? do I need to import anything?

A worked out example in Java would be greatly appreciated.

0
Comment
Question by:smik011
  • 3
  • 2
6 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 17050980
You need to import

net.goui.util.MTRandom
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17050986
If you delete

package net.goui.util;

(not recommended) then you can use it without import if in classpath
0
 
LVL 13

Accepted Solution

by:
Webstorm earned 250 total points
ID: 17051805
You can do :

java.util.Random r=new net.goui.util.MTRandom();
double myValue = r.nextDouble();

0
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 13

Expert Comment

by:Webstorm
ID: 17051828
Also MTRandom.java need to be in net/goui/util directory (create it)
then you must specify the directory where you put the "net" directory in the class path :

javac -cp .;C:\mylib MyClass.java
java -cp .;C:\mylib MyClass

if you have C:\mylib\net\goui\util\MTRandom.java
0
 
LVL 92

Expert Comment

by:objects
ID: 17055030
following gives example of generating random numbers

http://javaalmanac.com/egs/java.util/GenRandom.html
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 17064215
>>java.util.Random r=new net.goui.util.MTRandom();

That's not a good idea. You should be able to see which classes are used in a source file, not by reading it all, but by reading the imports at the top of the file
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Android studio getdrawable(int) is deprecated 4 116
ejb stateless example 2 21
login form jsp example 2 37
java mysql insert application 14 28
By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question