http://www.programmersheaven.com/ Contains the latest posts from the thread 'Help!!! Generating Random Numbers' posted on the 'Java Beginners' forum at Programmer's Heaven. en Copyright 2013 Programmers Heaven Wed, 19 Jun 2013 12:21:33 -0700 Wed, 19 Jun 2013 12:21:33 -0700 Argotic Syndication Framework 2007.3.0.1, http://www.codeplex.com/Argotic http://www.rssboard.org/rss-specification 360 http://www.programmersheaven.com/images/ph.gif http://www.programmersheaven.com/ 88 31 http://www.programmersheaven.com/mb/java_beginners/430351/430351/help-generating-random-numbers/ I keep getting duplicates, any suggestions??<br /> <br /> <br /> import javax.swing.JOptionPane;<br /> public class exam<br /> {<br /> public static void main(String[]args)<br /> {<br /> int maxn = 45 , index , dupindex,anum;<br /> int numsneeded ,pass,comparison,temp;<br /> String results ;<br /> numsneeded = Integer.parseInt(JOptionPane.showInputDialog(null, "please enter number of lotto numbers :"));<br /> int [] numbers = new int[numsneeded];<br /> for ( index= 0; index &lt; numsneeded;index ++)<br /> {<br /> anum = (int)(Math.random()* maxn)+1;<br /> numbers[index] = anum;<br /> for (dupindex = 0 ; numbers[dupindex] != anum;dupindex++)<br /> if (index == dupindex)<br /> index ++ ;<br /> }<br /> for (pass = 1 ; pass &lt;= numbers.length - 1 ;pass++)<br /> {<br /> for (comparison = 1 ;comparison &lt;= numbers.length - pass ; comparison ++)<br /> <br /> {<br /> if (numbers[comparison-1] &gt;numbers[comparison])<br /> {<br /> temp = numbers[comparison - 1 ];<br /> numbers[comparison - 1 ]= numbers[comparison];<br /> numbers[comparison] = temp;<br /> }<br /> }<br /> }<br /> results = "your lotto numbers are " + "\n";<br /> for (index = 0 ; index&lt; numbers.length;index ++)<br /> results += numbers[index] + "\n";<br /> JOptionPane.showMessageDialog(null,results);<br /> }<br /> } http://www.programmersheaven.com/mb/java_beginners/430351/430351/help-generating-random-numbers/ Wed, 21 Nov 2012 14:46:30 -0700 Java Beginners